Question

the cost price of 10 book is the same as selling price of 8 book the profit percentage

Answer 1

10CP=8SP

CP/SP=4/5

1/4*100=25%

Answer 2

Hey mate !!!!!

Here's your answer »»»»»»»»»»

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Let Rupees 1 be the Cost price of 10 books & Selling price of 8 books

According to the question, profit percent

= ( 10 - 8 / 8 ) × 100
= ( 2/8 ) × 100
= 1/4 × 100
= 25%

Therefore the person made 25% profit in the whole transaction

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Yo may also refer the attachment
Hope this helps
@PoojaBBSR