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 a percent of a number?

Back

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

Front

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

Back

The formula is: Whole = Part / (Percent in decimal form). For example, if 30% of a number is 15, the whole is 15 / 0.30 = 50.

Front

What does it mean if a number is 25% of another number?

Back

It means that the first number is one-fourth of the second number.

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 by 100. For example, 1/4 = 0.25 x 100 = 25%.

Front

What is 34% of 200?

Back

34% of 200 is 68.

Front

What is 10% of 150?

Back

10% of 150 is 15.

Front

If 80% of a class passed the exam and there are 40 students, how many passed?

Back

32 students passed the exam (40 x 0.80 = 32).

Front

What is the relationship between percent, fraction, and decimal?

Back

A percent can be converted to a fraction by placing it over 100 and simplifying. It can also be converted to a decimal by dividing by 100.

Front

What is 45% of 200?

Back

45% of 200 is 90.