Percents and Word Problems

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 amount after adding a percentage?

Back

Total Amount = Original Amount + (Original Amount * Percentage).

Front

If a product costs $80 and is on sale for 25% off, what is the sale price?

Back

Sale Price = $80 - ($80 * 0.25) = $60.

Front

What does it mean to find 'what percent' of a number?

Back

Finding 'what percent' of a number means determining what fraction of 100 the number represents.

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.

Front

What is the percent increase formula?

Back

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

Front

What is the percent decrease formula?

Back

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

Front

If 30% of a number is 15, what is the number?

Back

Number = 15 / 0.30 = 50.

Front

What is 75% of 200?

Back

75% of 200 = 200 * 0.75 = 150.