Subtract 21/30 from 7/49
7/49 - 21/30 is -39/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 30 is 1470
Next, find the equivalent fraction of both fractional numbers with denominator 1470 - For the 1st fraction, since 49 × 30 = 1470,
7/49 = 7 × 30/49 × 30 = 210/1470 - Likewise, for the 2nd fraction, since 30 × 49 = 1470,
21/30 = 21 × 49/30 × 49 = 1029/1470 - Subtract the two like fractions:
210/1470 - 1029/1470 = 210 - 1029/1470 = -819/1470 - After reducing the fraction, the answer is -39/70
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