# How to Calculate Percentages and Percentage Increases

Percentage is a ratio of some value to another. It is a mathematical term that comes from the Latin word “per centum” which means “out of one hundred.”

The percentage of a quantity is a number that is a ratio of that amount to some other amount, usually a quantity that is greater than it. In general, the percent will be expressed as a fraction with a denominator (number below) of 100.

#### How to Calculate Percentages

In math, a percent is a number that is expressed as a fraction with a denominator of 100. It is a simple and easy way to work with numbers because you do not have to worry about dividing or reducing the numerator to its lowest form, like you do when working with fractions.

You can convert percentages to fractions easily if the denominator is a whole number. All you need to do is divide the top number by the bottom one then multiply the resulting number by 100. Then place the percent symbol (%) after the decimal form of the result.

Percentages are useful to calculate discounts for items that have been reduced in price by a certain percentage. For example, if you are buying an item that originally costs $100 and the store gives you a 90 percent discount, the sales price of the item is $10.

#### How to Calculate a Percentage Increase

A percentage increase is an increase in the value of one quantity over another. The amount of the increase is measured in percentages, and it can be very easy to calculate.

If last year 96 students tried out for the Varsity Baseball team, and this year 212 students did, then what was the percent increase?

To calculate a percentage increase, you must subtract the starting number from the final number, divide the difference by the starting number and then multiply that number by 100.

This calculator is great for calculating percentages of two numbers, but it can also be used to find the percentage of any number. Simply type in the first and second numbers, and click the ‘Calculate’ button.

#### What is the percentage of 10%?

Similarly, what is the percentage of 15%?

If 10% of 200 apples are bad, then how many apples are good?

The percentage of 20% is 20 out of every 100 apples. This is a very common percentage because it represents a large portion of the total apples available for sale. It is not uncommon for people to use this percentage when evaluating an item, whether it is for its value or quality.