Question

By selling two watches for rs.780 each,Ravi earns 20% on one and loses 20% on the other.Find his net gain or loss percent

Answer 1

When we sold something on same price and get same profit and loss then use this shortcut

${( \frac{x}{10}) }^{2}$
Where x is profit or loss
And in this type of cases we always get loss

Solution of this question
X=20

${ (\frac{20}{10}) }^{2}$
=2²=4%

Ans is 4% loss


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