Question

By selling a book for Rs. 50, a man lost 4%. Find what would have been his gain or loss % if it had been sold for Rs. 60?

Answer 1

Answer:

$50 = \frac{96}{100} \times x$

$x = 50 \times \frac{100}{96}$

$60 = \frac{100 + y}{100} \times x$

$60 = \frac{100 + y}{100} \times 50 \times \frac{100}{96} \\ 96 \times 60 \div 50 = 100 + y$

$y = 17\%$