To cancel fractions, find a common factor e.g 14/28. 14 and 28 have a common factor of 2. Then divide both number by the common factor.
14÷2=7 28÷2=14. Find if there's another common factor of both numbers. 7 and 14 have a common factor of 7. 7÷7=1 14÷7=2, Therefore 14/28=1/2
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