Word Problems: Percents

Front

What is a percent?

Back

A percent is a way of expressing a number as a fraction of 100. It is denoted by the symbol '%'. For example, 40% means 40 out of 100.

Front

How do you calculate a percent of a number?

Back

To calculate a percent of a number, multiply the number by the percent (in decimal form). For example, to find 20% of 50, calculate 50 * 0.20 = 10.

Front

What does the term 'whole' refer to in percent problems?

Back

The 'whole' refers to the total amount or the entire quantity from which a percent is taken. For example, in a class of 50 students, 50 is the whole.

Front

What does the term 'part' refer to in percent problems?

Back

The 'part' refers to the portion of the whole that is represented by the percent. For example, if 40% of 50 students are girls, then the part is the number of girls.

Front

What is the equation to find the part when given a percent and a whole?

Back

The equation is: Part = Percent × Whole. For example, if the percent is 40% and the whole is 50, then Part = 0.40 × 50 = 20.

Front

If 40% of a class of 50 students are girls, how many girls are there?

Back

To find the number of girls, use the equation: Part = Percent × Whole. Here, Part = 0.40 × 50 = 20. So, there are 20 girls.

Front

What is the relationship between part, whole, and percent?

Back

The relationship is defined by the equation: Percent = (Part / Whole) × 100. This shows how the part relates to the whole in terms of percentage.

Front

How do you convert a percent to a decimal?

Back

To convert a percent to a decimal, divide the percent by 100. For example, 25% as a decimal is 25 ÷ 100 = 0.25.

Front

What is the tax amount if an item costs $15 and the tax rate is 6%?

Back

To find the tax amount, use the equation: Tax = Price × Tax Rate. Here, Tax = 15 × 0.06 = $0.90.

Front

What is the equation to find the total cost including tax?

Back

The equation is: Total Cost = Price + Tax. If the price is $15 and the tax is $0.90, then Total Cost = 15 + 0.90 = $15.90.