Subtract 28/20 from 8/7
1st number: 1 1/7, 2nd number: 1 8/20
8/7 - 28/20 is -9/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
8/7 = 8 × 20/7 × 20 = 160/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
28/20 = 28 × 7/20 × 7 = 196/140 - Subtract the two like fractions:
160/140 - 196/140 = 160 - 196/140 = -36/140 - After reducing the fraction, the answer is -9/35
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