3. Comparing and Ordering Fractions, Decimals, and Percents
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The greatest common factor (GCF) is the greatest factor shared by two or more numbers.
3
The greatest common factor (GCF) is the greatest number that is a factor of two or more numbers. The first step for finding a GCF is to list the factors of the numbers. Then we can find which one is the greatest.
| Given Numbers | Factors | GCF |
|---|---|---|
| 15 | 1, 3, 5, 15 | 3 |
| 36 | 1, 2, 3, 4, 6, 9, 12, 18, 36 | 3 |
The GCF of 15 and 36 is 3.