Question

Mary returned home after purchasing merchandise at Old Town. Her bill was $140 after receiving 15% discount. What was the original amount of sale?

Answer 1

$164.71

Explanation:

When you think about it Mary paid 85% of the original price because 100%-15%=85%.

So to get 1% of the original price, you can divide 140 by 85.140/85=1.64705882353

Then, if you multiply that by 15, you get how much 15% of the original price was (how much money she saved.

1.64705882353x15=24.7058823529

If you add that(15% of the original price) to 140(85% of the original price) you get the original price because 15%+85%=100%.

24.7058823529+140=164.705882353

then you have to round to the nearest hundredth because we are talking about money, which has cents. the 5 in the thousandths place makes the 0 before it round to 1. Hence, $164.71