Subtract 90/12 from 72/15
1st number: 4 12/15, 2nd number: 7 6/12
72/15 - 90/12 is -27/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 15 × 4 = 60,
72/15 = 72 × 4/15 × 4 = 288/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
90/12 = 90 × 5/12 × 5 = 450/60 - Subtract the two like fractions:
288/60 - 450/60 = 288 - 450/60 = -162/60 - After reducing the fraction, the answer is -27/10
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