Subtract 7/80 from 1/90
1/90 - 7/80 is -11/144.
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,
1/90 = 1 × 8/90 × 8 = 8/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
7/80 = 7 × 9/80 × 9 = 63/720 - Subtract the two like fractions:
8/720 - 63/720 = 8 - 63/720 = -55/720 - After reducing the fraction, the answer is -11/144
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