Percent Proportions Review #2

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, divide the part by the whole and then multiply by 100. Formula: (Part/Whole) x 100.

Front

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

Back

Whole = Part / (Percent / 100).

Front

If 40% of a class of 30 students take the bus, how many students take the bus?

Back

12 students take the bus (0.40 x 30 = 12).

Front

What percent of 75 is 15?

Back

20% (15/75 x 100 = 20%).

Front

If 60 out of 75 points were earned, what is the percent grade?

Back

80% (60/75 x 100 = 80%).

Front

What is the relationship between fractions and percents?

Back

Percents are a way to express fractions with a denominator of 100.

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

If 78 is what percent of 450?

Back

17% (78/450 x 100 = 17%).

Front

What is the percent increase if a price goes from $50 to $75?

Back

50% increase ([(75-50)/50] x 100 = 50%).