Percents and Percent Proportions

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 a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 25% of 80, calculate 80 * 0.25 = 20.

Front

What is a percent proportion?

Back

A percent proportion is an equation that shows the relationship between a part, a whole, and the percentage. It is often written as part/whole = percent/100.

Front

If 8 is 40% of what number, how do you find the number?

Back

Set up the equation: 8/number = 40/100. Cross-multiply and solve for the number.

Front

What is the formula to find the new salary after a raise?

Back

New Salary = Original Salary + (Original Salary * Percentage Raise).

Front

How do you calculate depreciation?

Back

Depreciation can be calculated by multiplying the original value by the depreciation rate and subtracting that from the original value.

Front

What is 10% of $5000?

Back

$500.

Front

If a car's value is $20000 and it depreciates by 15%, what is the depreciation amount?

Back

Depreciation amount = $20000 * 0.15 = $3000.

Front

What is the new value of a car after depreciation?

Back

New Value = Original Value - Depreciation Amount.

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 multiply by 100.