Subtract 42/15 from 63/84
1st number: 63/84, 2nd number: 2 12/15
63/84 - 42/15 is -41/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
42/15 = 42 × 28/15 × 28 = 1176/420 - Subtract the two like fractions:
315/420 - 1176/420 = 315 - 1176/420 = -861/420 - After reducing the fraction, the answer is -41/20
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