Subtract 70/49 from 7/21
1st number: 7/21, 2nd number: 1 21/49
7/21 - 70/49 is -23/21.
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,
70/49 = 70 × 3/49 × 3 = 210/147 - Subtract the two like fractions:
49/147 - 210/147 = 49 - 210/147 = -161/147 - After reducing the fraction, the answer is -23/21
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