Math 7: Percents Review

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 x 0.20 = 10.

Front

What is the formula for calculating the selling price after a markup?

Back

Selling Price = Cost Price + (Markup Percentage x Cost Price).

Front

If a laptop costs $500 and is marked up by 20%, what is the selling price?

Back

$600.

Front

How do you calculate the discount amount?

Back

Discount Amount = Original Price x (Discount Percentage in decimal form).

Front

If a shirt costs $50 and is on sale for 30% off, what is the sale price?

Back

$35.

Front

What is the formula for calculating the percent earned on a test?

Back

Percent Earned = (Points Earned / Total Points) x 100.

Front

If Eric earned 60 points out of 75, what percent did he earn?

Back

80%.

Front

What does it mean to find a percentage increase?

Back

A percentage increase shows how much a value has grown compared to its original amount, calculated as: ((New Value - Original Value) / Original Value) x 100.

Front

What does it mean to find a percentage decrease?

Back

A percentage decrease shows how much a value has decreased compared to its original amount, calculated as: ((Original Value - New Value) / Original Value) x 100.