To solve this ratio, we must first find the GCF, or the Greatest Common Factor, that is, the largest number that fits into both numbers. We can set up a table to compare the factors of each individual number, then identify common factors between the two numbers.
15 | 1 3 5 15
5 | 1 5
We see that the common factors include 1 and 5, however, 5 is the greatest common factor. Now we can simplify the ratio by dividing both numbers by 5.
5/5 = 1
15/5 = 3
Simplified Ratio: 1:3 (which is 1/3).
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