Subtract 90/7 from 45/54
1st number: 45/54, 2nd number: 12 6/7
45/54 - 90/7 is -505/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 54 and 7 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 54 × 7 = 378,
45/54 = 45 × 7/54 × 7 = 315/378 - Likewise, for the 2nd fraction, since 7 × 54 = 378,
90/7 = 90 × 54/7 × 54 = 4860/378 - Subtract the two like fractions:
315/378 - 4860/378 = 315 - 4860/378 = -4545/378 - After reducing the fraction, the answer is -505/42
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