Subtract 15/5 from 81/63
1st number: 1 18/63, 2nd number: 3 0/5
81/63 - 15/5 is -12/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 5 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
81/63 = 81 × 5/63 × 5 = 405/315 - Likewise, for the 2nd fraction, since 5 × 63 = 315,
15/5 = 15 × 63/5 × 63 = 945/315 - Subtract the two like fractions:
405/315 - 945/315 = 405 - 945/315 = -540/315 - After reducing the fraction, the answer is -12/7
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