Subtract 40/20 from 42/35
1st number: 1 7/35, 2nd number: 2 0/20
42/35 - 40/20 is -4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
42/35 = 42 × 4/35 × 4 = 168/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
40/20 = 40 × 7/20 × 7 = 280/140 - Subtract the two like fractions:
168/140 - 280/140 = 168 - 280/140 = -112/140 - After reducing the fraction, the answer is -4/5
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