Subtract 21/12 from 2/40
1st number: 2/40, 2nd number: 1 9/12
2/40 - 21/12 is -17/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 12 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
2/40 = 2 × 3/40 × 3 = 6/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
21/12 = 21 × 10/12 × 10 = 210/120 - Subtract the two like fractions:
6/120 - 210/120 = 6 - 210/120 = -204/120 - After reducing the fraction, the answer is -17/10
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