Subtract 4/7 from 8/20
8/20 - 4/7 is -6/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 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 7 × 20 = 140,
4/7 = 4 × 20/7 × 20 = 80/140 - Subtract the two like fractions:
56/140 - 80/140 = 56 - 80/140 = -24/140 - After reducing the fraction, the answer is -6/35
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