Subtract 72/98 from 18/20
18/20 - 72/98 is 81/490.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 98 is 980
Next, find the equivalent fraction of both fractional numbers with denominator 980 - For the 1st fraction, since 20 × 49 = 980,
18/20 = 18 × 49/20 × 49 = 882/980 - Likewise, for the 2nd fraction, since 98 × 10 = 980,
72/98 = 72 × 10/98 × 10 = 720/980 - Subtract the two like fractions:
882/980 - 720/980 = 882 - 720/980 = 162/980 - After reducing the fraction, the answer is 81/490
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