Question

Find the original cost of a rocker selling for $159.95 at 20% off.

Answer 1

We can use proportion here. As we know, cost of a rocker is now 80% of original.
So:
$159.95 ------------------80%$   crossmultiplying
$x---------------------------100%$

$x= \frac{159.95*100}{80}=199.94$ - aswer