Solutions by everydaycalculation.com

## Subtract 20/56 from 18/70

18/70 - 20/56 is -1/10.

#### Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
LCM of 70 and 56 is 280
2. For the 1st fraction, since 70 × 4 = 280,
18/70 = 18 × 4/70 × 4 = 72/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
20/56 = 20 × 5/56 × 5 = 100/280
4. Subtract the two fractions:
72/280 - 100/280 = 72 - 100/280 = -28/280
5. After reducing the fraction, the answer is -1/10

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