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Question
The cost price of an article is `4/5` times of its selling price. Find the loss or the gain as a percent.
Solution
Let S.P. = 1
C.P.=`4/5xx1=4/5`
∴ Gain = S.P. − C.P. ......[∵ Gain = S.P. − C.P.]
`=1-4/5=(5-4)/5=1/5`
∴ Gain %`="Gain"/"C.P."xx100`
`=(1/5)/(4/5)xx100`
`=1/5xx5/4xx100=25%`
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