Subtract 18/81 from 28/49
28/49 - 18/81 is 22/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 49 and 81 is 3969
Next, find the equivalent fraction of both fractional numbers with denominator 3969 - For the 1st fraction, since 49 × 81 = 3969,
28/49 = 28 × 81/49 × 81 = 2268/3969 - Likewise, for the 2nd fraction, since 81 × 49 = 3969,
18/81 = 18 × 49/81 × 49 = 882/3969 - Subtract the two like fractions:
2268/3969 - 882/3969 = 2268 - 882/3969 = 1386/3969 - After reducing the fraction, the answer is 22/63
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