ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
Playlist Numbers and Operations Test Questions 29 videos
SAT Math 1.1 Numbers and Operations. How many combinations of beverage and cereal can be made?
SAT Math: Numbers and Operations Drill 1, Problem 2. If the masterpiece will be worth $45,055 in five years, what is its worth now?
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
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...