Selina solutions for Concise Mathematics [English] Class 7 ICSE chapter 8 - Percent and Percentage [Latest edition]

Express the following as percent: `3/4`

Express the following as percent: `2/3`

Express the following as percent: 0.025

Express the following as percent: 0.125

Express the following as percent: `3/8`

Express the following as percent: 0.25

Express the following percentage as a fraction and as a decimal number: 

`7 1/2 %`

Express the following percentage as a fraction and as a decimal number: 

2.50 %

Express the following percentage as a fraction and as a decimal number: 

0.02 %

Express the following percentage as a fraction and as a decimal number: 

175 %

Express the following percentage as a fraction and as a decimal number: 

5 %

Express the following percentage as a fraction and as a decimal number: 

25 %

What percent is: 16 hours of 2 days?

What percent is: 40 paisa of Rs. 2?

What percent is: 25 cm of 4 metres

What percent is: 600 gm of 5 kg?

Find the value of: 5% of Rs. 350

Find the value of 10% of Rs. 400.40

Find the value of 1% of Rs. 500

Find the value of `12 1/2 %` of 80 kg

Find the value of `5/8 %` of Rs. 600.

Find the value of `33 1/3 %` of 27 m

In a class of 60 children, 30% are girls. How many boys are there?

In an election, two candidates A and B contested. A got 60% of the votes. The total votes polled were 8000. How many votes did each get?

A person saves 12% of his salary every month. If his salary is ₹2,500, find his expenditure.

Seeta got 75% marks out of a total of 800. How many marks did she lose ?

A shop worth ₹25,000 was insured for 95% of its value. How much would the owner get in case of any mishappening?

A class has 30 boys and 25 girls. What is the percentage of boys in the class?

Express: `3 2/5` as a percent.

Express: 0.0075 as a percent.

Express: 3 : 20 as percent.

Express: 60 cm as percent of 1 m 25 cm

Express: 9 hours as a percent of 4 days.

Find 2% of 2 hours 30 min

What percent of 12 kg is 725 gm?

Deepak bought a basket of mangoes containing 250 mangoes 12% of these were found to be rotten. Of the remaining, 10% got crushed. How many mangoes were in good condition?

In a Maths Quiz of 60 questions, Chandra got 90% correct answers and Ram got 80% correct answers. How many correct answers did each give? What percent is Ram’s correct answers to Chandra’s correct answers?

In an examination, the maximum marks are 900. A student gets 33% of the maximum marks and fails by 45 marks. What is the passing mark? Also, find the pass percentage.

In a train, 15% of people travel in the first class, 35% travel in second class. The balance travel in the A.C. class? Calculate the percentage of A.C. class travelers?

A boy eats 25% of the cake and gives away 35% of it to his friends. What percent of the cake is still left with him?

What is the percentage of vowels in the English alphabet?

`6 1/4%` of what number is 375?

0.2 % of a number is 5. Find the number.

30 is `16 2/3%` of a number. Find the number.

The money spent on the repairs of a house was 1% of its value. If the repair, costs Rs. 5,000, find the cost of the house.

In a school out of 300 students, 70% are girls and 30% are boys. If 30 girls leave and no new boy is admitted, what is the new percentage of girls in the school?

Kumar bought a transistor for Rs. 960. He paid 12 % cash money. The rest he agreed to pay in 12 equal monthly instalments. How much will he pay each month?

An ore contains 20% zinc. How many kg of ore will be required to get 45 kg of zinc?

The salary of a man is increased from Rs. 600 per month to Rs. 850 per month. Express the increase in salary as percent.

Increase: 60 by 5%

Increase: 20 by 15%

Increase: 48 by `12 1/2` %

Increase: 80 by 140%

Increase: 1000 by 3.5%

Decrease: 80 by 20%

Decrease: 300 by 10%

Decrease: 50 by 12.5 %

What number: When increased by 10% becomes 88?

What number when increased by 15% becomes 230?

What number: When decreased by 15% becomes 170?

What number: When decreased by 40% becomes 480?

What number: When increased by 100% becomes 100?

What number: When decreased by 50% becomes 50?

The price of a car is lowered by 20% to Rs. 40,000. What was the original price? Also, find a reduction in price.

If the price of an article is increased by 25%, The increase is Rs. 10. Find a new price.

If the price of an article is reduced by 10%, the reduction is Rs. 40. What is the old price?

The price of a chair is reduced by 25%. What is the ratio of:

(i) Change in price to the old price.
(ii) Old price to the new price.

If x is 20% less than y, find : `"x"/"y"`

If x is 20% less than y, find : `("y" - "x")/"y"`

If x is 20% less than y, find : `"x"/("y" - "x")`

If x is 30% more than y; find : `"x"/"y"`

If x is 30% more than y; find : `("y" + "x")/"x"`

If x is 30% more than y; find : `"y"/("y" - "x")`

The weight of a machine is 40 kg. By mistake it was weighed as 40.8 kg. Find the error percent.

From a cask, containing 450 litres of petrol, 8% of the petrol was lost by leakage and evaporation. How many litres of petrol was left in the cask?

An alloy consists of 13 parts of copper, 7 parts of zinc and 5 parts of nickel. What is the percentage of each metal in the alloy?

In an examination, first division marks are 60%. A student secures 538 marks and misses the first division by 2 marks. Find the total marks of the examination.

Out of 1200 pupils in a school, 900 are boys and the rest are girls. If 20% of the boys and 30% of the girls wear spectacles, find :

(i) how many pupils in all, wear spectacles?

(ii) what percent of the total number of pupils wear spectacles?

Out of 25 identical bulbs, 17 are red, 3 are black and the remaining are yellow. Find the difference between the numbers of red and yellow bulbs and express this difference as percent.

A number first increases by 20% and then decreases by 20%. Find the percentage increase or decrease on the whole.

A number is first decreased by 40% and then again decreased by 60%. Find the percentage increase or decrease on the whole.

If 150% of a number is 750, find 60% of this number.