Percents and Ratios

In a school of 200 students. 30% of the students participated in the singing competition. How many students participated in the competition?

• 200

• 60

• 30

• 100

Danny borrowed 20% of your pocket money.

You have $80 left in your wallet.

How much money do you have originally?

• 100

• 200

• 20

• 90

Danny spelled 12 of his 15 spelling words correctly on the test. What percent grade did Danny get on the test?

• 40%

• 50%

• 80%

• 60%

Poppy has 15 lawns mowed out of a total of 60 lawns. What percent is that?

• 15

• 25

• 19

• 4

What is a Ratio?

• Is a comparison of two quantities 

• To multiply two fractions 

• A number over another number

• Two decimals that can be multiplied

The picture shows a set of blue stars, red circles, and green circles. What is the ratio of the number of blue stars to red circles?

• 4 to 4

• 4 to 7

• 7 to 4

• 4 to 15

The ratio of boys to girls in the musical is 15 to 45. What is the ratio of girls to total students in the musical?

• 15 to 60

• 15 to 45

• 45 to 60

• 45 to 15

There are 20 blue socks and 80 red socks in a drawer. What is the ratio of red socks to blue socks?

• 20:80

• 20:100

• 80:100

• 80:20

Which represents the part of the 10-by-10 grid that is shaded?

• 19%

• 21%

• 8%

• 13%

Which represents the part of the 10-by-10 grid that is shaded?

• 65%

• 76%

• 57%

• 63%