Subtract 18/7 from 28/81
1st number: 28/81, 2nd number: 2 4/7
28/81 - 18/7 is -1262/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 7 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
28/81 = 28 × 7/81 × 7 = 196/567 - Likewise, for the 2nd fraction, since 7 × 81 = 567,
18/7 = 18 × 81/7 × 81 = 1458/567 - Subtract the two like fractions:
196/567 - 1458/567 = 196 - 1458/567 = -1262/567
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