Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents how much of something there is out of a total of 100.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 40% of 230, calculate 230 x 0.40 = 92.

Front

What is the formula to find the percent of a part compared to a whole?

Back

The formula is: (Part/Whole) x 100 = Percent.

Front

If 225 out of 250 seats are sold, how do you find the percent of seats sold?

Back

Use the formula: (225/250) x 100 = 90%.

Front

What is the ratio of birds to snakes if there are 4 birds and 6 snakes?

Back

The ratio of birds to snakes is 4:6, which simplifies to 2:3.

Front

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

Back

Use the formula: (Part/Whole) x 100. For example, to find what percent 8 is of 20, calculate (8/20) x 100 = 40%.

Front

What does it mean to find '34% of what number is 51'?

Back

It means you need to find a number such that when you take 34% of it, the result is 51. This can be solved by setting up the equation: 0.34 * x = 51.

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, 1/2 = 0.5 x 100 = 50%.

Front

What is the relationship between ratios and percentages?

Back

Ratios can be converted to percentages by expressing the ratio as a fraction of the total and then multiplying by 100.

Front

If a number is increased by 20%, how do you find the new value?

Back

To find the new value after a 20% increase, multiply the original number by 1.20.