Subtract 12/90 from 7/80
7/80 - 12/90 is -11/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
7/80 = 7 × 9/80 × 9 = 63/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
12/90 = 12 × 8/90 × 8 = 96/720 - Subtract the two like fractions:
63/720 - 96/720 = 63 - 96/720 = -33/720 - After reducing the fraction, the answer is -11/240
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