Subtract 15/45 from 72/63
1st number: 1 9/63, 2nd number: 15/45
72/63 - 15/45 is 17/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
72/63 = 72 × 5/63 × 5 = 360/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
15/45 = 15 × 7/45 × 7 = 105/315 - Subtract the two like fractions:
360/315 - 105/315 = 360 - 105/315 = 255/315 - After reducing the fraction, the answer is 17/21
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