Question

find profit and loss per cent if CPis 30 and SP is 42

Answer 1

cp = 30
sp = 42
sp - cp = loss
42 - 30 = 22
loss/ loss percent == 22/100 = 5%

Answer 2

$= Hey \: Mate \: your \: answer \: is \: here...... \\ = cp = 30 \\ = sp = 42 \\ we \: know \\ profit = sp - cp \\ p = 42 - 30 \\ p = 12 \\ p \% = \frac{(p \times 100)}{cp} \\ p = \frac{(12 \times 100)}{30} \\ p = \frac{1200}{30 } \\ p = 40\% \\ then \: the \: profit \: percent \: is \: 40 \: on \: sp \: 42$