Subtract 3/81 from 8/10, Solve 8/10

Subtract 3/81 from 8/10

8/10 - 3/81 is 103/135.

Find the least common denominator or LCM of the two denominators:
LCM of 10 and 81 is 810

Next, find the equivalent fraction of both fractional numbers with denominator 810
For the 1st fraction, since 10 × 81 = 810,
8/10 = 8 × 81/10 × 81 = 648/810
Likewise, for the 2nd fraction, since 81 × 10 = 810,
3/81 = 3 × 10/81 × 10 = 30/810
Subtract the two like fractions:
648/810 - 30/810 = 648 - 30/810 = 618/810
After reducing the fraction, the answer is 103/135

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