Subtract 72/80 from 18/49
18/49 - 72/80 is -261/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920
Next, find the equivalent fraction of both fractional numbers with denominator 3920 - For the 1st fraction, since 49 × 80 = 3920,
18/49 = 18 × 80/49 × 80 = 1440/3920 - Likewise, for the 2nd fraction, since 80 × 49 = 3920,
72/80 = 72 × 49/80 × 49 = 3528/3920 - Subtract the two like fractions:
1440/3920 - 3528/3920 = 1440 - 3528/3920 = -2088/3920 - After reducing the fraction, the answer is -261/490
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