Understanding Percentages

What does the percent symbol represent in terms of a ratio?

• A ratio out of 50

• A ratio out of 100

• A ratio out of 10

• A ratio out of 1000

How can 85 out of 100 be expressed as a decimal?

• 8.5

• 0.085

• 0.85

• 85.0

If 85 out of 100 teenagers have cell phones, what percentage does this represent?

• 850%

• 0.85%

• 85%

• 8.5%

Why is it important to convert percentages to fractions or decimals before calculations?

• To make the numbers larger

• To simplify the calculation process

• To make the numbers smaller

• To avoid using a calculator

How would you convert 25% to a decimal for calculation purposes?

• 0.025

• 25.0

• 0.25

• 2.5