Subtract 40/15 from 42/20
1st number: 2 2/20, 2nd number: 2 10/15
42/20 - 40/15 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 15 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
42/20 = 42 × 3/20 × 3 = 126/60 - Likewise, for the 2nd fraction, since 15 × 4 = 60,
40/15 = 40 × 4/15 × 4 = 160/60 - Subtract the two like fractions:
126/60 - 160/60 = 126 - 160/60 = -34/60 - After reducing the fraction, the answer is -17/30
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