Mastering Mental Percentage Tricks

What does 'percent' literally mean?

• Per fifty

• Per ten

• Per thousand

• Per hundred

How do you calculate 50% of a number?

• Divide the number by 10

• Multiply the number by 0.5

• Divide the number by 2

• Multiply the number by 0.05

Tags

CCSS.6.RP.A.3C

What is 10% of 80?

• 800

• 80

• 10

• 8

Tags

CCSS.6.RP.A.3C

How can 1% of a number be calculated?

• Multiply the number by 0.01

• Divide the number by 100

• Divide the number by 10

• Multiply the number by 0.1

Tags

CCSS.6.RP.A.3C

What is 5% of 80?

• 40

• 400

• 8

• 4

Tags

CCSS.6.RP.A.3C

How would you calculate 12% of 80 using the method described?

• Divide 80 by 12

• Multiply 80 by 0.12

• Calculate 10% and 2% separately and add them

• Subtract 12% from 100%

Tags

CCSS.6.RP.A.3C

What is the result of 51% of 70?

• 35.7

• 36

• 37

• 35

Tags

CCSS.6.RP.A.3C

How do you calculate 98% of 680?

• Subtract 2% of 680 from 680

• Add 98 to 680

• Multiply 680 by 0.98

• Divide 680 by 98

Tags

CCSS.6.RP.A.3C

What is 42% of 45?

• 17.5

• 18.9

• 19

• 20

Tags

CCSS.6.RP.A.3C

Calculate 56% of 440.

• 240

• 250

• 245

• 246.4

Tags

CCSS.6.RP.A.3C