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 '%'.

Front

How do you find a percentage of a number?

Back

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

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal. For example, if a/b = c/d, then a, b, c, and d are in proportion.

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 = (1 ÷ 4) * 100 = 25%.

Front

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

Back

The formula is: Total = Part / (Percent in decimal form). For example, if 25 is 20% of a total, then Total = 25 / 0.20 = 125.

Front

If 30 is 60% of a number, how do you find that number?

Back

Use the formula: Number = Part / Percent in decimal form. So, Number = 30 / 0.60 = 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. For example, if 25 is 25% of 100, then 25 is one-fourth of 100.

Front

How do you find what percent one number is of another?

Back

To find what percent one number is of another, divide the first number by the second number and multiply by 100. For example, to find what percent 20 is of 80, calculate (20 ÷ 80) * 100 = 25%.

Front

What is the relationship between percentages and decimals?

Back

Percentages can be converted to decimals by dividing by 100. For example, 75% as a decimal is 0.75.

Front

How do you calculate the percent increase?

Back

Percent increase is calculated by: ((New Value - Original Value) / Original Value) * 100.