Subtract 63/70 from 8/20
8/20 - 63/70 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
63/70 = 63 × 2/70 × 2 = 126/140 - Subtract the two like fractions:
56/140 - 126/140 = 56 - 126/140 = -70/140 - After reducing the fraction, the answer is -1/2
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