Percent Proportions

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 25% means 25 out of 100.

Front

How do you find 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. This gives you the percentage.

Front

What is the formula to calculate the percentage of a number?

Back

The formula to calculate the percentage of a number is: (Percentage/100) * Total = Part.

Front

If 25% of a class of 40 students are girls, how many girls are in the class?

Back

10 girls. (25/100) * 40 = 10.

Front

What does it mean if 50% of a number is 30?

Back

It means that the total number is 60, because 50% of 60 is 30.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the top number (numerator) by the bottom number (denominator) and then multiply by 100.

Front

What is the relationship between percentages, fractions, and decimals?

Back

Percentages, fractions, and decimals are different ways to represent the same value. For example, 50% = 0.5 = 1/2.

Front

If 70% of a number is 140, what is the number?

Back

The number is 200. (140 / 0.7) = 200.

Front

How do you find the total when given a part and its percentage?

Back

To find the total when given a part and its percentage, use the formula: Total = Part / (Percentage/100).

Front

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

Back

The percent increase is 50%. ((75-50)/50) * 100 = 50%.