Subtract 70/63 from 12/21
1st number: 12/21, 2nd number: 1 7/63
12/21 - 70/63 is -34/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
12/21 = 12 × 3/21 × 3 = 36/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Subtract the two like fractions:
36/63 - 70/63 = 36 - 70/63 = -34/63
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