Subtract 81/63 from 70/15
1st number: 4 10/15, 2nd number: 1 18/63
70/15 - 81/63 is 71/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 15 × 21 = 315,
70/15 = 70 × 21/15 × 21 = 1470/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
81/63 = 81 × 5/63 × 5 = 405/315 - Subtract the two like fractions:
1470/315 - 405/315 = 1470 - 405/315 = 1065/315 - After reducing the fraction, the answer is 71/21
- In mixed form: 38/21
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