Subtract 28/30 from 12/40
12/40 - 28/30 is -19/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 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 30 × 4 = 120,
28/30 = 28 × 4/30 × 4 = 112/120 - Subtract the two like fractions:
36/120 - 112/120 = 36 - 112/120 = -76/120 - After reducing the fraction, the answer is -19/30
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