Understanding Percentages in Everyday Life

What is the first step in calculating 10% of a number?

• Add 10 to the number

• Divide the number by 10

• Move the decimal point one place to the left

• Multiply the number by 0.1

If a bill is $30, what is 10% of it?

• $3

• $30

• $0.30

• $300

If you want to calculate a 20% tip on a $50 bill, what should you do after finding 10%?

• Double the 10% value

• Triple the 10% value

• Subtract $5 from the bill

• Add $5 to the bill

How can you estimate a 15% tip using the 10% method?

• Find the average of 10% and 20%

• Triple the 10% value

• Subtract 5% from the 10% value

• Add 5% to the 10% value

What is a good strategy for estimating a sales tax of 8.25%?

• Use 15% as an estimate

• Find a value between 5% and 10%

• Use 5% as an estimate

• Use 10% as an estimate