Question

by selling a radio for rs 950 a maan losses 5% what percentage shall he gains by selling it for rs 1040

Answer 1

Original price of the radio
$950 + 5\% \: of \: 950 \\ = 950 + 47.50 \\ = 997.50$
Now, by selling he will gain.
$\frac{1040}{997.5} \times 100 \% \\ = 104.27\% \\ which \: means \: he \: will \: gain \: 4.27\%(approximately)$