Step-by-step explanation:
1. Break down both the numerator (top number) and denominator (bottom number) into their prime factors.
For example, suppose you want to reduce the fraction 12/30. Break down both 12 and 30 into their prime factors.
12/30 = 2×3×3 / 2×3×5
2. Cross out any common factors.
In this example, you cross out a 2 and a 3, because they’re common factors — that is, they appear in both the numerator and denominator.
3. Multiply the remaining numbers to get the reduced numerator and denominator.
This shows you that the fraction 12/30 reduces to 2/5.
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