Question

Skyler bought a shirt marked R160. At the till she only paid R144. What
percentage discount did she get?​

Answer 1

Answer:

$sp = (1 - \frac{d}{100}) \times mp$

$144 = (1 - \frac{d}{100}) \times 160$

$144 = \frac{100 - d}{100} \times 160$

$14400 = (100 -d) \times 160$

$14400 = 16000 - 160d$

$14400 - 16000 = - 160d$

$- 2400 = - 160d$

$2400 = 160d$

$\frac{2400}{160} = d$

$15\% = d$