CC2: Chapter 5.1.1, 7.1.3, 7.1.7 and 7.1.8 Test on 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 30% of a number?

Back

To calculate 30% of a number, multiply the number by 0.30.

Front

If Sarah earns $20 a day and spends 30% of it, how much does she spend?

Back

$6

Front

What does '40% off' mean when buying an item?

Back

It means you pay 60% of the original price, as 40% is deducted from it.

Front

How do you calculate the sale price after a discount?

Back

Subtract the discount amount from the original price.

Front

What is the formula for percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) x 100.

Front

If 72 people got a speeding ticket one week and 36 the next, what is the percent change?

Back

Decrease 50%.

Front

How do you find the number of girls if 40% of 200 children are boys?

Back

Calculate 40% of 200 (80 boys), then subtract from 200 to find girls (200 - 80 = 120 girls).

Front

What is a tip in a restaurant context?

Back

A tip is a small amount of money given to service workers for their service, usually a percentage of the bill.

Front

How do you calculate a tip of 23% on a bill of $6.68?

Back

Multiply $6.68 by 0.23 to get $1.54.