Ratios and Percents

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, showing how many times one value contains or is contained within the other.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply the result by 100.

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100, denoted by the symbol %.

Front

How do you find a percent of a number?

Back

To find a percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What is the formula for calculating percent change?

Back

Percent change = (New Value - Old Value) / Old Value * 100.

Front

What does it mean to say '60% of 80'?

Back

It means to calculate 60 percent of the number 80, which is 0.60 * 80 = 48.

Front

How do you express 0.75 as a percent?

Back

To express 0.75 as a percent, multiply by 100, resulting in 75%.

Front

What is the relationship between ratios and fractions?

Back

Ratios can be expressed as fractions, where the first quantity is the numerator and the second quantity is the denominator.

Front

If a shirt costs $40 and is on sale for 25% off, how much will it cost after the discount?

Back

The discount is 25% of $40, which is $10. Therefore, the shirt will cost $40 - $10 = $30 after the discount.

Front

What is 10% of 200?

Back

10% of 200 is calculated as 0.10 * 200 = 20.