Subtract 21/15 from 70/63
1st number: 1 7/63, 2nd number: 1 6/15
70/63 - 21/15 is -13/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 15 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
70/63 = 70 × 5/63 × 5 = 350/315 - Likewise, for the 2nd fraction, since 15 × 21 = 315,
21/15 = 21 × 21/15 × 21 = 441/315 - Subtract the two like fractions:
350/315 - 441/315 = 350 - 441/315 = -91/315 - After reducing the fraction, the answer is -13/45
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