Question

A $220 tablet is on sale at half price for $110. You have a coupon for 20% off the sale price. If you use your coupon to buy the tablet, what percent of the original price will you pay?

Answer 1

ok so $220 is the original price
          $110 is the sale price
          20% is applicable for the sale price

$110×0.2   (20%=$\frac{20}{100}$ = 0.2)
= $22

Original price × $\frac{n}{100}$  = 22
220 × $\frac{n}{100}$ = 22
$\frac{n}{100}$ = 0.1
n = 100×0.1
n=10%
We pay 10% of the original price.
Check: 220 × 0.1          (10%=$\frac{10}{100}$ = 0.1)
           =$22