Dorene O. answered 05/27/14
Tutor
5
(51)
Ivy League educated tutor for Math, History, English and Test Prep
Since the unit price is $14.06, we can find the total cost by multiplying that by 30, to give
us $421.80 if there were no discount.
We can find the discount price in two equivalent ways, either by finding 30% of 421.80 and subtracting that,
or by finding 100% - 30% = 70%. That is, the new price will be 70% of the old price. Since they want
the new price, and not the discounted amount, it is simpler to use 70%
70% = 70/100 (per cent, meaning out of 100, cent being the latin root for 100), or 0.7.
0.7 x 421.80 = $295.26, which is the discount price.
Dorene O