Calculating 25%, 50% and 75% of a Number

This video tutorial explains how to calculate percentages of a number using 50% as a starting point. It demonstrates the process through four examples, showing how to find 50%, 25%, and 75% of different numbers. The video concludes with a challenge for viewers to apply the method to calculate 75% of 86.

What is the first step in finding 75% of a number using the method discussed?

• Find 1% of the number

• Find 25% of the number

• Find 50% of the number

• Find 10% of the number

If 50% of 400 is 200, what is 25% of 400?

• 50

• 100

• 200

• 150

How do you calculate 75% of 400 after finding 25%?

• Multiply 25% by 2

• Add 25% to 50%

• Subtract 25% from 100%

• Multiply 25% by 3

What is the result of halving 60 to find 50%?

• 30

• 20

• 35

• 25

After finding 25% of 60, how do you determine 75%?

• Subtract 25% from 100%

• Multiply 25% by 4

• Multiply 25% by 3

• Add 25% to 50%

What is 50% of 840?

• 630

• 840

• 420

• 210

How do you find 75% of 26 after calculating 25%?

• Multiply 25% by 2

• Multiply 25% by 3

• Subtract 25% from 100%

• Add 25% to 50%