Subtract 20/12 from 42/35
1st number: 1 7/35, 2nd number: 1 8/12
42/35 - 20/12 is -7/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 35 × 12 = 420,
42/35 = 42 × 12/35 × 12 = 504/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
20/12 = 20 × 35/12 × 35 = 700/420 - Subtract the two like fractions:
504/420 - 700/420 = 504 - 700/420 = -196/420 - After reducing the fraction, the answer is -7/15
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