Question

a man bought 12 articles at rs 10 and sold 15 articles at rs 12 what is the loss or gain percentage​

Answer 1

$gain \: = \: sp - cp \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 15 - 10 \\ \: \: \: \: \: \: \: \: \: \ \: \: \: \: \: \: \: \: = 5 \\ gain\% = \frac{gain}{sp} \times 100 \\ \frac{5}{15} \times 100 \\ = \frac{20}{3} = 6.66$