Subtract 36/49 from 18/40
18/40 - 36/49 is -279/980.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
18/40 = 18 × 49/40 × 49 = 882/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
36/49 = 36 × 40/49 × 40 = 1440/1960 - Subtract the two like fractions:
882/1960 - 1440/1960 = 882 - 1440/1960 = -558/1960 - After reducing the fraction, the answer is -279/980
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