Subtract 54/80 from 12/90
12/90 - 54/80 is -13/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 90 × 8 = 720,
12/90 = 12 × 8/90 × 8 = 96/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
54/80 = 54 × 9/80 × 9 = 486/720 - Subtract the two like fractions:
96/720 - 486/720 = 96 - 486/720 = -390/720 - After reducing the fraction, the answer is -13/24
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