Mastering Percent Calculations in Mental Math

The video tutorial explains how to find the percent of a number, using real-life examples like sales, tips, and taxes. It covers methods to calculate 10%, 50%, 25%, 75%, 20%, and 5% of a number, emphasizing moving the decimal and dividing by specific numbers. The tutorial provides practical examples and encourages students to practice these calculations.

What does finding the percent of a number mean?

• Finding the whole number

• Subtracting the number from 100

• Finding a part of the number

• Multiplying the number by 100

If a pair of pants costs $40 and is 30% off, how much do you pay?

• $28

• $30

• $40

• $12

How do you find 10% of a number?

• Move the decimal one place to the right

• Multiply by 10

• Divide by 10

• Move the decimal one place to the left

What is 10% of 54.8?

• 54.8

• 5.48

• 548

• 0.548

How do you find 50% of a number?

• Multiply by 2

• Divide by 2

• Divide by 50

• Multiply by 50

What is 50% of 95?

• 50

• 45

• 47.5

• 90

How can you find 25% of a number?

• Divide by 2 twice

• Multiply by 4

• Divide by 4

• Both A and C

What is 25% of 200?

• 200

• 25

• 50

• 100

How do you find 75% of a number?

• Add 25% and 50%

• Subtract 25% from 100%

• Multiply by 75

• Divide by 4

How do you find 20% of a number?

• Multiply 10% by 2

• Divide 10% by 2

• Multiply 50% by 2

• Divide 50% by 2