7th grade percent 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 the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal). For example, to find 20% of 50, calculate 50 x 0.20 = 10.

Front

What is the formula to find the sale price after a discount?

Back

Sale Price = Original Price - (Original Price x Discount Rate).

Front

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

Back

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

Front

How do you convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign. For example, 0.3 x 100 = 30%.

Front

What is the percent of 15 out of 60?

Back

Percent = (15 / 60) x 100 = 25%.

Front

If 40% of a class of 30 students are girls, how many girls are in the class?

Back

Number of girls = 30 x 0.40 = 12 girls.

Front

What is the relationship between fractions and percents?

Back

Fractions can be converted to percents by dividing the numerator by the denominator and multiplying by 100.

Front

How do you find the total amount if you know the percent and the part?

Back

Total Amount = Part / (Percent as a decimal). For example, if 20 is 25% of a total, Total = 20 / 0.25 = 80.

Front

What is 45% of 200?

Back

45% of 200 = 200 x 0.45 = 90.