Subtract 15/18 from 40/80
40/80 - 15/18 is -1/3.
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,
40/80 = 40 × 9/80 × 9 = 360/720 - Likewise, for the 2nd fraction, since 18 × 40 = 720,
15/18 = 15 × 40/18 × 40 = 600/720 - Subtract the two like fractions:
360/720 - 600/720 = 360 - 600/720 = -240/720 - After reducing the fraction, the answer is -1/3
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