Math

Rates and Ratios

100

This type of ratio compares one part of a group to the whole group

Part-Whole-Ratio 

200

What is the difference between a rate and a ratio?

Rate compares two different units, ratio compares the same units

300

Write the following relationship as a ratio: 3 red apples, 4 green apples 

3:4, 3/4, 3 to 4 

400

What is the simplest equivalent of this ratio: 8:10 

4:5

500

What is the simplest equivalent ratio for this ratio: 52:100

13:25

Decimals to Percents

100

What is the rule for converting a decimal to a percentage?

Multiply by 100

200

Convert 0.5 to a percentage. 

50%

300

Convert 0.78 to a percentage.

78%

400

Convert 1.25 to a percentage.

125%

500

Convert 2.45 to a percentage.

245%

Percents to Decimals

100

What is the rule for converting a percent to a decimal?

divide by 100 

200

convert 45% to a decimal. 

0.45

300

Convert 21% to a decimal. 

0.21

400

Convert 142% to a decimal. 

1.42

500

If an item is on sale for 65% off, what decimal would they have to multiply the original price by to figure out the new price?

0.65

Rounding

100

If the next digit to the right is 5 or more, do you round up or down? 

round up

200

If the next digit to the right is 4 or less, do you round up or down? 

round down

300

round 0.45 to the nearest tenth. 

0.5

400

Round 0.56666... to the nearest hundredth 

0.57

500

Write the decimal 0.3333... using bar notation. 

0.3̅

Percentages of Numbers

100

What is the first step in finding the percentage of a number? 

Convert it to a decimal. 

200

What is 50% of 12?

6

300

What is 61% of 45?

27.45

400

What is 120% of 10? 

12

500

If an item is on sale for 40% off, and the item costs $15.00, how much money are you saving? 

$6