Simple Percents Mental Math

What is 100% of 45?

• 4.5

• 450

• 4

• 45

Figure the 20% tip:  
Bill totals $82.50

• $16.50

• $8.25

• $10.00

• $0.82

Figure the 20% tip:  
Bill totals $13.20

• $0.13

• $10.00

• $1.32

• $2.64

Figure the 20% tip:  
Bill totals $42.50

• $9.00

• $4.25

• $8.50

• $0.42

Figure the 20% tip:  
Bill totals $142.00

• $28.40

• $20.00

• $14.20

• $1.42

Calculate 25% of 80

• 20

• 80

• 48

• 95

What is 10% of 15?

• 5

• 1.56

• 2.5

10% OF $18.30

• $183

• $10.00

• $1.83

• $0.18

What is 5% of 80?

• 4

• 8

• 20

• 16

A student earned an 80% on a math test that had 20 problems.  How many problems on the test did the student answer correctly?

• 20

• 4

• 16

• 12