home adding and subtracting fractions removing brackets 1 comparing fractions complex fractions decimals notes on the difference of 2 squares dividing fractions solving equations equivalent fractions exponents and roots factoring rules factoring polynomials factoring trinomials finding the least common multiples the meaning of fractions changing fractions to decimals graphing linear equations inequalities linear equations linear inequalities multiplying and dividing fractions multiplying fractions multiplying polynomials percents polynomials powers powers and roots quadratic equations quadratic expressions radicals rational expressions inequalities with fractions rationalizing denominators reducing fractions to lowest terms roots roots or radicals simplifying complex fractions simplifying fractions solving simple equations solving linear equations solving quadratic equations solving radical equations in one variable solving systems of equations using substitution straight lines subtracting fractions systems of linear equations trinomial squares
Try the Free Math Solver or Scroll down to Tutorials!

 Depdendent Variable

 Number of equations to solve: 23456789
 Equ. #1:
 Equ. #2:

 Equ. #3:

 Equ. #4:

 Equ. #5:

 Equ. #6:

 Equ. #7:

 Equ. #8:

 Equ. #9:

 Solve for:

 Dependent Variable

 Number of inequalities to solve: 23456789
 Ineq. #1:
 Ineq. #2:

 Ineq. #3:

 Ineq. #4:

 Ineq. #5:

 Ineq. #6:

 Ineq. #7:

 Ineq. #8:

 Ineq. #9:

 Solve for:

 Please use this form if you would like to have this math solver on your website, free of charge. Name: Email: Your Website: Msg:

Percents are used to describe a part of something. Percents are used to figure out sales or the amount of interest someone will pay on a loan. When converting a percent to its fraction form, it will always have a denominator of 100.

## Changing Decimals to Percents or Percents to Decimals

The important key is where to move the decimal point. If changing from decimal to a percent , you would need to move the decimal point two places to the right and add the percent sign.

Example:

0.35 = 35%

0.8 = 80%

To change from percent to decimal, need to move the decimal point two places to the left and drop the percent sign.

Example:

30% = .3

0.9% = .009

## Converting Fraction to Percent Form

Divide the bottom number of the fraction into the top number and move the point two places to the right.

Example:

-or-

Multiply the fraction by 100%

Example:

## Percent to Fraction

Example: 85%

Write the percent as a fraction with 100 as the denominator. Then reduce the fraction to lowest terms.

## Percent of a Number

 1) What is 25% of \$6,500. 2) Change the percent to a fraction n = 25% × \$6,500n = .25 x 6500 n = \$1,625

## Finding What Percent One Number Is of Another

There are key words to remember that will help you solve the problem it is asking you. The word ‘of’ in the sentence means to multiply. The word ‘is‘ means it is equal to.

Example: 9 is what percent of 45 The variable ‘a’ is being multiplied by 45. Need to divide by 45. 9 = a (x) 45 9 = 45a

The variable ‘a’ is being multiplied by 45. Need to divide by 45.

Therefore, 20% of 45 is 9.

## Finding a Number When a Percent of It is Given

Example: 20% of what number is 16?

Change the percent to fraction form.

Need to multiply both sides of the equation by 5.