Subtract 54/15 from 7/40
1st number: 7/40, 2nd number: 3 9/15
7/40 - 54/15 is -137/40.
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,
7/40 = 7 × 3/40 × 3 = 21/120 - Likewise, for the 2nd fraction, since 15 × 8 = 120,
54/15 = 54 × 8/15 × 8 = 432/120 - Subtract the two like fractions:
21/120 - 432/120 = 21 - 432/120 = -411/120 - After reducing the fraction, the answer is -137/40
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