Question

Step by step as asked in the book (solve it in copy then upload)

Answer 1

Step-by-step explanation:

Let S.P. of 1 book is Rs.1

S.P. of 72 books = Rs. 72

Loss = Rs.8

C.P. = S.P. + Loss = 72+8 = Rs.80

Loss % = Loss/C.P.*100 = 10%