ACT Math 5.4 Pre-Algebra

ACT Math: Pre-Algebra Drill 5, Problem 4. What was the percent discount of the sweater?

ACT MathPre-Algebra
ACT MathematicsPre-Algebra
Foreign LanguageArabic Subtitled
Chinese Subtitled
Korean Subtitled
Spanish Subtitled
LanguageEnglish Language
Pre-AlgebraBasic operations
Percentages
Product TypeACT Math
Ratios, Percentages, and ProportionsPercents

Transcript

00:21

And here are the potential answers...

00:27

New minus old over old. New minus old over old. New minus old over old...

00:32

That's your mantra when encountering problems like this one baby. Don't forget it. Ever.

00:38

Let's plug in the 54 plus tax as the old... and 35 plus tax as the new.

00:49

First, we have to clean up the tax stuff. If only our government would follow our lead...

00:54

For the 54 we have to get the tax dollar amount, so we multiply by 1.08 to get $58.32.

01:01

Now do the same for the 35, multiply 35 by 1.08 and we get $37.80.

01:08

So we paid $37.80 minus $58.32 over $58.32... and it looks like we've got ourselves an equation.

01:17

When we do the math, we get -$20.52 over $58.32.

01:22

The negative sign means that there is a decrease in price...

01:25

...which gives us a discount of .35... or 35%.

01:30

Answer A.

01:30

As in, "Adorable."