Benchmark Percents

How do you calculate 75% of a number?

• Multiply the number by 0.75

• Divide by 4 and then multiply that by 3

• Subtract 25% from the number

• Multiply the number by 0.25

What is the method to find 50% of a number?

• Multiply the number by 2

• Add the number to itself

• Divide the number by 2

• Subtract the number from 100

How can you find 15% of a number?

• 15% = 10% + 5%. Move the decimal left one place value for 10%, then take half of that number for 5%. Add them together for 15%.

• 15% = 5% + 10%. Multiply the number by 0.15 directly.

• 15% = 20% - 5%. Subtract 5% from 20% of the number.

• 15% = 30% / 2. Divide the number by 2 and then multiply by 30%.

How do you calculate 150% of a number

• 150% = 100% + 50%

  Take half of the number and then add it to the whole amount

• 150% = 50% + 100%

  Multiply the number by 1.5

• 150% = 200% - 50%

  Subtract half of the number from the whole amount

• 150% = 100% + 25%

  Take a quarter of the number and then add it to the whole amount

What is 20% of a number?

• Find 10% (move decimal 1 place value to the left) and then double it

• Multiply the number by 0.2

• Add 20 to the number

• Divide the number by 5

How do you calculate 33 1/3% of a number?

• Multiply the number by 3

• Add the number to itself

• Divide the number by 3

• Subtract 1/3 of the number from itself

How do you calculate 100% of a number?

• 100% = 1

• Take the whole amount

• Multiply the number by 0.5

• Add 50% to the number

How do you find 10% of a number?

• Move the decimal one place to the left

• Multiply the number by 0.1

• Add 10 to the number

• Divide the number by 10

How do you calculate 5% of a number?

• Find 10% of the number and then halve it

• Multiply the number by 0.05

• Add 5 to the number

• Divide the number by 20

What is the method to find 25% of a number?

• Divide the number by 4

• Multiply the number by 4

• Find 50% (1/2) of the number and then double it

• Subtract 25 from the number