7.RP.3 Percents & Scale Factor

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 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, 0.065 becomes 6.5%.

Front

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

Back

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

Front

If 10 is what percent of 80, how do you find the answer?

Back

Use the formula: Percent = (10/80) x 100 = 12.5%.

Front

What does 'whole' refer to in percent problems?

Back

The 'whole' refers to the total amount or the entire quantity from which a part is taken.

Front

What does 'part' refer to in percent problems?

Back

The 'part' refers to the portion of the whole that is being considered.

Front

How do you calculate 30% of $40?

Back

Multiply $40 by 0.30: $40 x 0.30 = $12.

Front

If an item costs $24 and is on sale for 45% off, how do you find the sale price?

Back

Calculate the discount: $24 x 0.45 = $10.80. Then subtract the discount from the original price: $24 - $10.80 = $13.20.

Front

What is the relationship between scale factor and percent?

Back

The scale factor can be expressed as a percent when comparing two quantities. For example, a scale factor of 1.5 is equivalent to a 150% increase.

Front

What does it mean if a color is 30% in a mixture?

Back

It means that 30% of the total mixture is made up of that color.