Subtract 45/12 from 72/45
1st number: 1 27/45, 2nd number: 3 9/12
72/45 - 45/12 is -43/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 12 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180 - Likewise, for the 2nd fraction, since 12 × 15 = 180,
45/12 = 45 × 15/12 × 15 = 675/180 - Subtract the two like fractions:
288/180 - 675/180 = 288 - 675/180 = -387/180 - After reducing the fraction, the answer is -43/20
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