Percent Proportion

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 for finding the percent of a total?

Back

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

Front

If 30 out of 150 students passed an exam, what percent passed?

Back

20%. (30 / 150) * 100 = 20.

Front

What is the relationship between fractions and percentages?

Back

Fractions can be converted to percentages by multiplying by 100. For example, 1/4 = 0.25 = 25%.

Front

How do you find the total amount after adding a percentage?

Back

To find the total amount after adding a percentage, calculate the percentage of the original amount and then add it to the original amount. For example, for a $100 item with a 20% increase: $100 + ($100 * 0.20) = $120.

Front

What is the formula for calculating a tip based on a percentage?

Back

Tip = Total Bill Amount * Tip Percentage.

Front

If a shirt costs $40 and is on sale for 25% off, what is the sale price?

Back

The sale price is $30. (25% of $40 is $10, so $40 - $10 = $30.)

Front

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

Back

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

Front

What is the percent increase formula?

Back

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