Question

3) A sweater that was 15% off now costs $15.30. What was the original cost? A $24 B $15.45 C $30.3 D $18

Answer 1

A sweater that was 15% off now costs $15.30.

Amount of sweater afters sale = 15.30

as sale discount of 15%

So,15.30 - 15% of 15.30 =

simplify for the x :

$\begin{gathered} x-\frac{15\times x}{100}=15.30 \\ x-\frac{15x}{100}=15.30 \\ \frac{100x-15x}{100}=15.30 \\ x=18 \\ So,\text{ the initiall the cost is\ 18} \end{gathered}$

Answer : D) $18