Subtract 21/6 from 12/40
1st number: 12/40, 2nd number: 3 3/6
12/40 - 21/6 is -16/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 6 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 6 × 20 = 120,
21/6 = 21 × 20/6 × 20 = 420/120 - Subtract the two like fractions:
36/120 - 420/120 = 36 - 420/120 = -384/120 - After reducing the fraction, the answer is -16/5
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