Subtract 18/40 from 72/15
1st number: 4 12/15, 2nd number: 18/40
72/15 - 18/40 is 87/20.
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,
72/15 = 72 × 8/15 × 8 = 576/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
18/40 = 18 × 3/40 × 3 = 54/120 - Subtract the two like fractions:
576/120 - 54/120 = 576 - 54/120 = 522/120 - After reducing the fraction, the answer is 87/20
- In mixed form: 47/20
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