Chapter 5 Review - Percents

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 20% of a number?

Back

To calculate 20% of a number, multiply the number by 0.20.

Front

What does it mean to have a discount of 20%?

Back

A discount of 20% means that the price is reduced by 20 out of every 100 units of currency.

Front

If a shirt costs $40 and is on sale for 20% off, what is the discount amount?

Back

The discount amount is $8 (20% of $40).

Front

What is the new price of a shirt that originally costs $40 after a 20% discount?

Back

The new price is $32 ($40 - $8).

Front

What fraction represents 20%?

Back

20% can be represented as the fraction 20/100, which simplifies to 1/5.

Front

If 40% of a number is 120, how do you find the whole number?

Back

To find the whole number, divide 120 by 0.40, which equals 300.

Front

What is the formula to find a percentage of a number?

Back

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

Front

If Sara scored 80% on her math test and answered 32 questions correctly, how do you find the total number of questions?

Back

Divide the number of correct answers by the percentage in decimal form: 32 / 0.80 = 40.

Front

What is 87% of 55?

Back

87% of 55 is 47.85 (0.87 x 55).