Subtract 7/40 from 54/15
1st number: 3 9/15, 2nd number: 7/40
54/15 - 7/40 is 137/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
54/15 = 54 × 8/15 × 8 = 432/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120 - Subtract the two like fractions:
432/120 - 21/120 = 432 - 21/120 = 411/120 - After reducing the fraction, the answer is 137/40
- In mixed form: 317/40
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