How to Find the Answer to 20% of What Number Is 8?

Percentage problems can come in many variations.
••• Jupiterimages/Photos.com/Getty Images

Math percentage problems can often be confusing since they can have many variations. Whether you need to find the percentage of a number or what percentage a number is of another, each type of problem fortunately follows a set formula to make it simpler. The problem of finding what number that 20 percent of is 8 can be solved with the formula a = p * x, where a is the comparative number, or number after the percent has been applied, p is the percentage amount and x is the original number.

    Divide 20 percent by 100 to obtain its decimal form. Dividing 20 percent by 100 equals 0.2.

    Set up an equation as 0.2x = 8, which means 20 percent of x equals 8.

    Solve the equation by dividing each side by 0.2. Dividing 0.2 from each side results in x = 40. Eight is 20 percent of 40.

Related Articles

How to Solve Percentage Problems
How to Find Out How Much 6% Is of a Number
How to Calculate the Percent of One Hour
How to Solve Percentage Problems
How to Calculate the Percentage of Another Number
How to Calculate a 10 Percent Discount
How do I Calculate 0.1%?
How to Subtract 20% on a Calculator
How to Use the Percentage Key on a Calculator
How to Calculate Percent Agreement Between Two Numbers
How to Calculate the Top 20 Percent
How to Write 33% As a Fraction
Impress Your Date on Valentine's by Calculating the...
How to Increase a Number by a Percentage
How to Teach Math Percentages to 6th Grade
How to Calculate the Percent Weight Per Volume
How to Divide Rational Numbers
How to Add Percentage to a Price
How to Divide a Percent Using a Calculator

Dont Go!

We Have More Great Sciencing Articles!