Subtract 45/12 from 28/40
1st number: 28/40, 2nd number: 3 9/12
28/40 - 45/12 is -61/20.
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,
28/40 = 28 × 3/40 × 3 = 84/120 - Likewise, for the 2nd fraction, since 12 × 10 = 120,
45/12 = 45 × 10/12 × 10 = 450/120 - Subtract the two like fractions:
84/120 - 450/120 = 84 - 450/120 = -366/120 - After reducing the fraction, the answer is -61/20
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