Subtract 72/6 from 21/40
1st number: 21/40, 2nd number: 12 0/6
21/40 - 72/6 is -459/40.
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,
21/40 = 21 × 3/40 × 3 = 63/120 - Likewise, for the 2nd fraction, since 6 × 20 = 120,
72/6 = 72 × 20/6 × 20 = 1440/120 - Subtract the two like fractions:
63/120 - 1440/120 = 63 - 1440/120 = -1377/120 - After reducing the fraction, the answer is -459/40
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