Percents Review

Front

What is the formula to calculate percent of change?

Back

Percent of Change = (New Value - Old Value) / Old Value × 100

Front

If an item originally costs $50 and is now $30, what is the percent of change?

Back

Percent of Change = (30 - 50) / 50 × 100 = -40% (decrease)

Front

What does it mean to convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100.

Front

Convert 25% to a decimal.

Back

0.25

Front

What is 50% of 200?

Back

100

Front

If a shirt is on sale for 30% off and originally costs $40, what is the sale price?

Back

Sale Price = Original Price - (Original Price × Discount) = 40 - (40 × 0.30) = $28

Front

What is the relationship between fractions, decimals, and percents?

Back

They are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

Convert 0.75 to a percent.

Back

75%.

Front

If a student scored 18 out of 20 on a test, what percent did they score?

Back

Percent Score = (18 / 20) × 100 = 90%.

Front

What is the percent increase if a stock price goes from $50 to $75?

Back

Percent Increase = (75 - 50) / 50 × 100 = 50%.