Percent Proportions

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 the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (in decimal form) and then divide by 100.

Front

What is the formula to find the whole when given a part and a percent?

Back

Whole = Part / (Percent / 100)

Front

If 20 is 40% of a number, how do you find that number?

Back

Number = 20 / 0.40 = 50.

Front

What is the relationship between fractions and percents?

Back

Percents can be converted to fractions by placing the percent over 100 and simplifying.

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 multiply by 100.

Front

What is 30% of 80?

Back

30% of 80 is 24.

Front

If 71 out of 200 plants have developed seeds, what percent is that?

Back

71 out of 200 is 35.5%.

Front

How do you find the percent decrease?

Back

Percent Decrease = (Original Value - New Value) / Original Value x 100.

Front

What is the percent increase if a price goes from $50 to $65?

Back

Percent Increase = (65 - 50) / 50 x 100 = 30%.