Percent of a Number

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is often used to compare ratios.

Front

How do you calculate 10% of a number?

Back

To calculate 10% of a number, multiply the number by 0.10.

Front

If you have 40 problems and 10% are incorrect, how do you find the number of incorrect problems?

Back

Multiply 40 by 0.10 to find that 4 problems are incorrect.

Front

What is the formula to find the percent of a number?

Back

Percent = (Part / Whole) x 100.

Front

How do you convert a fraction to a percent?

Back

Divide the numerator by the denominator and multiply by 100.

Front

If Caroline got 19 out of 25 questions correct, how do you find the percent correct?

Back

Divide 19 by 25, then multiply by 100 to get 76%.

Front

What does it mean if 40% of jellybeans are red?

Back

It means that for every 100 jellybeans, 40 are red.

Front

How do you find 40% of 55 jellybeans?

Back

Multiply 55 by 0.40 to find that 22 jellybeans are red.

Front

If 35% of students did not go to the movies, how do you find the number of students who did not go?

Back

Multiply the total number of students by 0.35.

Front

What is the cost of a $25 jacket after a 40% discount?

Back

Calculate 40% of $25 (which is $10), then subtract $10 from $25 to get $15.