Subtract 72/18 from 54/15
1st number: 3 9/15, 2nd number: 4 0/18
54/15 - 72/18 is -2/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 18 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 15 × 6 = 90,
54/15 = 54 × 6/15 × 6 = 324/90 - Likewise, for the 2nd fraction, since 18 × 5 = 90,
72/18 = 72 × 5/18 × 5 = 360/90 - Subtract the two like fractions:
324/90 - 360/90 = 324 - 360/90 = -36/90 - After reducing the fraction, the answer is -2/5
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