Percent Proportions Flashcard

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 50, calculate 50 * 0.20 = 10.

Front

What is the formula to find the total when a percentage is known?

Back

If you know the percentage and the part, you can find the total using the formula: Total = Part / (Percentage / 100).

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and multiply by 100. For example, 1/4 = (1 ÷ 4) * 100 = 25%.

Front

What is 30% of 200?

Back

30% of 200 is 60. (200 * 0.30 = 60)

Front

If 15 out of 100 students passed a test, what percent passed?

Back

15 out of 100 is 15%. (15/100 * 100 = 15%)

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

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

Back

To find what percent one number (Part) is of another (Whole), use the formula: (Part / Whole) * 100.

Front

What is 150% of 20?

Back

150% of 20 is 30. (20 * 1.5 = 30)

Front

How do you increase a number by a percentage?

Back

To increase a number by a percentage, calculate the percentage of the number and add it to the original number. For example, to increase 100 by 20%, calculate 100 + (100 * 0.20) = 120.