Subtract 12/15 from 25/40
25/40 - 12/15 is -7/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 15 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
25/40 = 25 × 3/40 × 3 = 75/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
12/15 = 12 × 8/15 × 8 = 96/120 - Subtract the two like fractions:
75/120 - 96/120 = 75 - 96/120 = -21/120 - After reducing the fraction, the answer is -7/40
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