Subtract 80/49 from 7/21
1st number: 7/21, 2nd number: 1 31/49
7/21 - 80/49 is -191/147.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
7/21 = 7 × 7/21 × 7 = 49/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
80/49 = 80 × 3/49 × 3 = 240/147 - Subtract the two like fractions:
49/147 - 240/147 = 49 - 240/147 = -191/147
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