Subtract 80/81 from 2/7
2/7 - 80/81 is -398/567.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
2/7 = 2 × 81/7 × 81 = 162/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
80/81 = 80 × 7/81 × 7 = 560/567 - Subtract the two like fractions:
162/567 - 560/567 = 162 - 560/567 = -398/567
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