Percents Review

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate what percent one number is of another?

Back

To find what percent one number (A) is of another number (B), use the formula: (A/B) * 100.

Front

What is the formula for percent of error?

Back

Percent of error = |(Estimated Value - Actual Value)| / Actual Value * 100.

Front

If 24 is what percent of 30, how do you solve it?

Back

(24/30) * 100 = 80%.

Front

What does a percent of change represent?

Back

Percent of change measures how much a quantity increases or decreases relative to its original value.

Front

How do you calculate percent of change?

Back

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

Front

If David bought a bike for $125 and sold it for $200, what is the percent of change?

Back

Percent of change = ((200 - 125) / 125) * 100 = 60%.

Front

What is the percent of a number?

Back

To find the percent of a number, multiply the number by the percent (as a decimal). For example, 80% of 35 is 0.8 * 35 = 28.

Front

How do you round a percent to the nearest whole number?

Back

If the decimal is .5 or higher, round up. If it's less than .5, round down.

Front

What is the percent of error if Jo expected 90% but got 95%?

Back

Percent of error = |(90 - 95)| / 95 * 100 = 5%.