Subtract 20/80 from 3/18
3/18 - 20/80 is -1/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 18 × 40 = 720,
3/18 = 3 × 40/18 × 40 = 120/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
20/80 = 20 × 9/80 × 9 = 180/720 - Subtract the two like fractions:
120/720 - 180/720 = 120 - 180/720 = -60/720 - After reducing the fraction, the answer is -1/12
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