ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Math Videos 320 videos
SAT Math 1.3 Numbers and Operations. x and y must be which of the following?
SAT Math 5.4 Numbers and Operations 210 Views
Share It!
Description:
SAT Math 5.4 Numbers and Operations
SAT Math 5.4 Numbers and Operations
Transcript
- 00:02
Here’s your shmoop du jour, brought to you by Sweaters.
- 00:06
A word of warning: don’t ever wear them while herding sheep.
- 00:12
A sweater is on sale for 25% off the original price. Beth has a coupon for an additional
- 00:17
10% off the sale price. What is the total discount (as a percent)?
- 00:23
Okay, so even though this problem doesn’t give us the original price of the sweater,
Full Transcript
- 00:27
we have enough information to find the answer.
- 00:29
25% off means that Beth is paying 75% of the original price.
- 00:35
10% off the sale price means that Beth is paying 90% of that 75% of the original price.
- 00:42
All we have to do is multiply the decimal forms of those percents.
- 00:46
And we get 0.9 times 0.75 is 0.675. Or 67.5% of the original price.
- 00:54
The original price is 100%.
- 00:57
So we can subtract 100% by the percentage Beth is actually paying 67.5%...
- 01:02
to get the percent discount.
- 01:04
Got that? 100% - 67.5% equals 32.5%...
- 01:10
So the percent discount is 32.5% and we're done.
Related Videos
SAT Math 2.1 Geometry and Measurement. What is the measure of angle z in terms of x and y?
In 2014, the unemployment rate of one county in California was 7%. In another county, the unemployment rate was 11%. Which of the following express...
Angela is making cookies for a bake sale. She expects each batch of her cookies to sell for $40. It costs her $10 to make one batch of cookies, and...