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 the percent of a number?

Back

To calculate the percent of a number, multiply the number by the percent (as a decimal) and then divide by 100.

Front

What is the formula for simple interest?

Back

Simple Interest = Principal × Rate × Time.

Front

If you have $2000 at 9% interest for 4 years, what is the simple interest?

Back

The simple interest is $720.

Front

If you have $675 at 10% interest for 6 years, what is the simple interest?

Back

The simple interest is $405.

Front

If Oliver got 75% of the total questions correct and answered 24 questions correctly, how many questions were on the final?

Back

There were 32 questions on the final.

Front

What does it mean to round to the nearest tenth?

Back

Rounding to the nearest tenth means adjusting a number to one decimal place, based on the value of the hundredths place.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and then multiply by 100.

Front

What is the percent increase formula?

Back

Percent Increase = ((New Value - Old Value) / Old Value) × 100.

Front

What is the percent decrease formula?

Back

Percent Decrease = ((Old Value - New Value) / Old Value) × 100.