Advertisements
Advertisements
Question
The number 12,000 is first decreased by 25% and then increased by 25%. Find the resulting number.
Solution
The resulting = The original number x `(1 -25/100) xx (1+25/100)`
= `12000 xx (75)/(100) xx (125)/(100)`
= 11,250
APPEARS IN
RELATED QUESTIONS
In an examination, a candidate secured 125 marks and failed by 15 marks. If the pass percentage was 35%; find the maximum marks.
In a combined test in English and Physics; 36% candidates failed in English; 28% failed in Physics and 12% in both; find:
the percentage of passed candidates
A number is first increased by 20% and the resulting number is then decreased by 10%. Find the overall change in the number as percent.
Express the following as percent: 0.025
Find the value of `33 1/3 %` of 27 m
Express as a percent:
0.02
The price of rice rises from Rs. 30 per kg to Rs. 36 per kg. Find the percentage rise in the price of rice.
Air is an important inexhaustible natural resource. It is essential for the survival of human beings, microbes, plants, and animals. The following table shows the percentage of various gases in the air.
Contents of air | Percentage (by volume) |
Nitrogen | 78 |
Oxygen | 21 |
Other (carbon dioxide, inert gases, water vapours, etc.) | 1 |
In 800 m3 of air, calculate the approximate quantities of nitrogen, oxygen, and other gases.
There are 500 students in a rural school. If 370 of them can swim, what percentage of them can swim and what percentage cannot?
The food labels given below give information about 2 types of soup: cream of tomato and sweet corn. Use these labels to answer the given questions. (All the servings are based on a 2000 calorie diet.)
Sweet Corn | Cream of Tomato | ||
Nutrition Facts | Nutrition Facts | ||
Serving Size 1 cup (240ml) | Serving Size 1 cup (240ml) | ||
About 2 serving per Container | About 2 serving per Container | ||
Amount Per Serving | Amount Per Serving | ||
Calories 90 | Calories from Fat 9 | Calories 100 | Calories from Fat 20 |
% Daily Value* | % Daily Value* | ||
Total Fat 2g | 2% | Total Fat 2g | 3% |
Saturated Fat-0g | 0% | Saturated Fat-1.5g | 6% |
Cholesterol 0mg | 0% | Cholesterol 10mg | 3% |
Sodium 540mg | 22% | Sodium 690mg | 29% |
Total Carbohydrate 17g | 6% | Total Carbohydrate 17g | 6% |
Dietary Fibre 3 gram | 14% | Dietary Fibre 4 gram | 18% |
Sugar 5g | Sugar 11g | ||
Protein 3g | Protein 2g | ||
Vitamin A 30% | Vitamin C 10% | Vitamin A 20% | Vitamin C 20% |
Calcium 2% | Iron 6% | Calcium 0% | Iron 8% |
*Per cent Daily Values are based on a 2,000 calorie diet. |
*Per cent Daily Values are based on a 2,000 calorie diet. |
Which can be measured more accurately : the total amount of fat in cream of tomato soup or the total amount of fat in sweet corn soup? Explain.