Subtract 20/15 from 12/40
1st number: 12/40, 2nd number: 1 5/15
12/40 - 20/15 is -31/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
12/40 = 12 × 3/40 × 3 = 36/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
20/15 = 20 × 8/15 × 8 = 160/120 - Subtract the two like fractions:
36/120 - 160/120 = 36 - 160/120 = -124/120 - After reducing the fraction, the answer is -31/30
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