3.1 Percents of Numbers
Change the percent to a decimal.
73%
.73
What number is 25% of 40?
10
Ted's car is now worth $9,000, which is 60% of what he paid for it. What did he pay for his car?
$15,000
34 students in Mr. Jones' math class passed the final exam. There are 40 students in his class total. What percent of students passed?
85%
Change percents to fractions.
62%
62/100
Change the percent to a decimal.
112%
1.12
What percent of 8 is 6?
75%
The regular price of a TV is $475. It's currently on sale for 20% off. What is the discount if you bought the TV during the sale?
$95
Sixty-eight percent of Valley Creek School students attend this year's homecoming dance. If 459 students attended the dance, how many students are there in the school?
675
Change percents to fractions.
4.5%
4.5/100
Change the decimal to a percent.
0.6
60%
33 is 33% of what number?
100
John needs $8000 to buy a car. So far, he has saved $5,600. What percent of the price of the car has he saved?
70%
Nina sells ninety-five percent of her cookies at the bake sale. She sold 475 cookies. How many cookies did she bake all together?
500
1/2
50%
Change the decimal to a percent.
0.45
45%
Find 90% of 40.
36
A company that makes hair-care products had 3,000 people try a new shampoo. Of the 3,000 people, 9 had a mild allergic reaction. What percent of the people had a mild allergic reaction?
0.3%
A fund-raiser at the school raises $617.50. They sent $580.45 to local charities. What percent of the money went to charities?
94%
70/100
70%
Change decimal to percent.
4.89
489%
The rabbit population in a certain area is 200% of last year's population. There are 1,100 rabbits this year. How many were there last year?
550 rabbits
The Washingtons buy a studio apartment for $240,000. They pay a down payment of $60,000.
a. Their down payment is what percent of the purchase price?
b. What percent of the purchase price would a $12,000 down payment be?
a. 25%
b. 5%
Mika's rosebush had 24 blooms the first week of May. This was 80% as many blooms as Tammy's rosebush had during the same period. How many blooms did Tammy's rosebush have?
30
What is the formula we used for Percents?
is/of=%/100 or part/whole=%/100