Percents (Math 7)

Front

What is the formula to calculate percent change?

Back

Percent Change = ((New Value - Old Value) / Old Value) * 100

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 75% of a number?

Back

To find 75% of a number, multiply the number by 0.75.

Front

How do you find what percent one number is of another?

Back

To find what percent one number (part) is of another number (whole), use the formula: (Part / Whole) * 100.

Front

What is the percent of a total when given a part?

Back

Percent = (Part / Total) * 100.

Front

If a class has 30 students and 12 are girls, what percent of the class are girls?

Back

Percent of girls = (12 / 30) * 100 = 40%.

Front

What is the relationship between fractions, decimals, and percents?

Back

Fractions, decimals, and percents are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

How do you calculate 125% of a number?

Back

To calculate 125% of a number, multiply the number by 1.25.

Front

What is the percent change if a quantity increases from 50 to 75?

Back

Percent Change = ((75 - 50) / 50) * 100 = 50%.

Front

How do you round a percent to the nearest whole number?

Back

To round a percent to the nearest whole number, look at the first decimal place. If it's 5 or more, round up; if it's less than 5, round down.