Understanding Percent Calculations

In this video, Mr. J explains how to calculate percentages using a calculator by converting percentages to decimals. He provides four examples: calculating 40% of 25, 5% of 60, 84% of 36, and 91% of 125. Each example involves converting the percentage to a decimal by dividing by 100 and then multiplying by the given number. The video concludes with a summary of the method and a thank you to viewers.

What is the first step in calculating a percentage of a number using a calculator?

• Convert the percentage to a fraction

• Add the percentage to the number

• Subtract the percentage from the number

• Convert the percentage to a decimal

How do you convert 40% to its decimal form?

• Move the decimal point two places to the right

• Divide by 10

• Move the decimal point two places to the left

• Multiply by 10

What is the result of 40% of 25?

• 10

• 20

• 5

• 15

What is the decimal equivalent of 5%?

• 5.0

• 0.005

• 0.05

• 0.5

What is 5% of 60?

• 6

• 30

• 3

• 12

How do you find 84% of 36?

• Divide 36 by 0.84

• Multiply 36 by 0.84

• Subtract 0.84 from 36

• Add 0.84 to 36

What is the result of 84% of 36?

• 32.64

• 34.56

• 28.56

• 30.24

What is the decimal form of 91%?

• 0.091

• 91.0

• 0.91

• 9.1

What is 91% of 125?

• 112.50

• 110.75

• 113.75

• 115.25

What is the general method to calculate a percentage of a number?

• Add the percentage to the number

• Multiply the number by the decimal form of the percentage

• Subtract the percentage from the number

• Divide the number by the percentage