Subtract 14/7 from 4/81, Solve 4/81

Subtract 14/7 from 4/81

1^st number: 4/81, 2^nd number: 2 0/7

4/81 - 14/7 is -158/81.

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,
4/81 = 4 × 7/81 × 7 = 28/567
Likewise, for the 2nd fraction, since 7 × 81 = 567,
14/7 = 14 × 81/7 × 81 = 1134/567
Subtract the two like fractions:
28/567 - 1134/567 = 28 - 1134/567 = -1106/567
After reducing the fraction, the answer is -158/81

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