Subtract 18/72 from 21/98
21/98 - 18/72 is -1/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 72 is 3528
Next, find the equivalent fraction of both fractional numbers with denominator 3528 - For the 1st fraction, since 98 × 36 = 3528,
21/98 = 21 × 36/98 × 36 = 756/3528 - Likewise, for the 2nd fraction, since 72 × 49 = 3528,
18/72 = 18 × 49/72 × 49 = 882/3528 - Subtract the two like fractions:
756/3528 - 882/3528 = 756 - 882/3528 = -126/3528 - After reducing the fraction, the answer is -1/28
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