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One method in reducing fractions is to find a common factor that can be divided evenly into both the numerator (top number) and the denominator (bottom number).

A quick way to determine a common factor is to consider the divisibility rules for 2, 3, 5, and 10.

**A number is divisible by 2 IF the last digit of the number is an even number. That is, if the last digit is a 0, 2, 4, 6, or 8. Positive example: 346 is divisible by 2 because the last digit 6 is an even number. Negative example: 467 is not divisible by 2 because the last digit 7 is NOT an even number.

**A number is divisible by 3 if the sum of the digits is divisible by 3. Positive example: 246 is divisible by 3 because 2+4+6= 12 and 12 is divisible by 3. Negative example: 211 is NOT divisible by 3 because 2+1+1= 4 and 4 is not divisible by 3.

**A number is divisible by 5 if the last digit is a “0” or “5”. Positive example: 12,435 is divisible by 5 because the last digit is a “5”. Negative example: 11,231 is NOT divisible by 5 because the last digit is a 1, not a “0” or “5”.

** A number is divisible by 10 if the last digit is a “0”. Positive example: 12, 340 is divisible by 10 because the last digit is a “0”. Negative example: 986 is NOT divisible by 10 because the last digit is a 6, not a “0”.

Remember, when you reduce fractions….. you use a form of 1. That means that both the numerator and denominator must be divisible by the SAME number.

View Video on how to reduce fractions and download free printable worksheets on reducing fractions worksheets to help learn/reinforce the “how to” of reducing fractions to lowest terms. Knowing how to reduce is important anytime you are working with fractions, whether you are adding, subtracting, dividing, or dividing. The video and free math worksheets are great for anyone who is learning basic math skills for GED, TASC, or HISET….

Download worksheets. Each download is a PDF that contains one worksheet and answer key.

Having trouble with fractions? Want to know the difference between a proper fraction and an improper fraction and other vocabulary associated with fractions? View the video to be introduced to the fraction vocabulary words you will learn about in Fractions On-Line Course: Understanding Fractions.

Do you have the basic math skills to study for the rigor of the GED Math test? Would you like to be sure…. take a math assessment? As of 03/2/2020, there were more than 40,000 responses, and 85% gave this Pre-GED math assessment a “thumbs up”.

Looking for additional practice before you take the GED math test? Look no further. Questions will be added on a regular basis.

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