FLASHCARD Percents (Proportions & Equations)

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 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 20% of 75, calculate 75 * 0.20 = 15.

Front

What is 98% of 200?

Back

196

Front

If 20% of a number is 4, what is the number?

Back

To find the number, divide 4 by 0.20. The number is 20.

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. For example, 1/4 = 0.25 = 25%.

Front

What is the formula for finding the total amount when given a percentage?

Back

Total Amount = Part / (Percentage in decimal form). For example, if you know 10% of a total is 50, the total is 50 / 0.10 = 500.

Front

What does it mean to find a proportion?

Back

Finding a proportion means determining the relationship between two quantities, often expressed as a fraction or ratio.

Front

If Jack gives away 10% of his earnings and gives away $256, how do you find his total earnings?

Back

Total Earnings = Amount Given Away / Percentage Given Away in decimal form. Total Earnings = 256 / 0.10 = $2,560.

Front

What is 20% of 20?

Back

4

Front

How do you find the percentage increase?

Back

Percentage Increase = (New Value - Original Value) / Original Value * 100.