Subtract 18/63 from 20/15
1st number: 1 5/15, 2nd number: 18/63
20/15 - 18/63 is 22/21.
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,
20/15 = 20 × 21/15 × 21 = 420/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
18/63 = 18 × 5/63 × 5 = 90/315 - Subtract the two like fractions:
420/315 - 90/315 = 420 - 90/315 = 330/315 - After reducing the fraction, the answer is 22/21
- In mixed form: 11/21
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