Subtract 8/18 from 20/80
20/80 - 8/18 is -7/36.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 18 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
8/18 = 8 × 40/18 × 40 = 320/720 - Subtract the two like fractions:
180/720 - 320/720 = 180 - 320/720 = -140/720 - After reducing the fraction, the answer is -7/36
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