Percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you calculate the percentage of a number?

Back

To calculate the percentage of a number, multiply the number by the percentage (in decimal form) and then divide by 100.

Front

What is the formula to find the percent of change?

Back

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

Front

If 90% of 430 students are passing, how many are not passing?

Back

43 students are not passing.

Front

How do you calculate a tip based on a percentage?

Back

To calculate a tip, multiply the total bill by the tip percentage (in decimal form).

Front

What is the total cost if dinner is $23.77 and a 10% tip is added?

Back

The total cost is $26.15.

Front

What does a decrease of 40% mean in terms of price?

Back

A decrease of 40% means the price is reduced by 40 out of every 100 units of the original price.

Front

How do you find the percent decrease in price?

Back

Percent Decrease = ((Original Price - Sale Price) / Original Price) x 100.

Front

If a sweater's price is reduced from $20 to $12, what is the percent reduction?

Back

The price is reduced by 40%.

Front

What is sales tax?

Back

Sales tax is a percentage added to the price of goods and services, collected by the seller and paid to the government.