Subtract 2/4 from 7/81
7/81 - 2/4 is -67/162.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 4 is 324
Next, find the equivalent fraction of both fractional numbers with denominator 324 - For the 1st fraction, since 81 × 4 = 324,
7/81 = 7 × 4/81 × 4 = 28/324 - Likewise, for the 2nd fraction, since 4 × 81 = 324,
2/4 = 2 × 81/4 × 81 = 162/324 - Subtract the two like fractions:
28/324 - 162/324 = 28 - 162/324 = -134/324 - After reducing the fraction, the answer is -67/162
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