13. The selling price of 18 books is equal to the cost price of 21 books. Find the gain or loss per cent.
Answers
Answered by
7
Answer:
sp of 18 books = cp of 21 books
sp/cp =21/18
gain %= gain/cp *100 = sp-cp/cp *100 = 21-18/18 *100 = 3/18 *100=100/6=16.66
Step-by-step explanation:
Similar questions