Percents Unit Review

Front

What is the formula to calculate the percent of change?

Back

Percent of Change = (New Value - Old Value) / Old Value × 100

Front

If Ron sold $2400 worth of clothing and earned $84 in commission, how do you find the commission rate?

Back

Commission Rate = (Commission Earned / Total Sales) × 100

Front

What is 6.75% as a decimal?

Back

0.0675

Front

How do you calculate the total cost including sales tax?

Back

Total Cost = Price + (Price × Sales Tax Rate)

Front

What is the simple interest formula?

Back

Simple Interest = Principal × Rate × Time

Front

If Ralph buys a computer for $675 and the sales tax is 6%, how much is the sales tax?

Back

Sales Tax = $675 × 0.06 = $40.50

Front

What is 35% of 200?

Back

35% of 200 = 0.35 × 200 = 70

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide by 100.

Front

What is the percent of change if a class size increases from 27 to 30?

Back

Percent of Change = (30 - 27) / 27 × 100 = 11%.

Front

If you have a principal of $1,000 and an interest rate of 6.75%, how much interest will you earn in 15 years?

Back

Interest = $1,000 × 0.0675 × 15 = $1,012.50.