Question

I bought a watch for 400 and sold of it for 484 . find the gain percent

Answer 1

gain per cent = gain/400 ×100

=21%

Answer 2

we know that

profit =sp - cp

484-400

84

$gain \: \: \: or \: profit \: \: \: percent \: \:\% = \frac{profit}{cp} \times 100 \\ \frac{84}{400} \times 100 \\ \frac{84}{4} \\ 21\% \:$

gain percent =21%