Subtract 3/81 from 10/42, Solve 10/42

Subtract 3/81 from 10/42

10/42 - 3/81 is 38/189.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 81 is 1134

Next, find the equivalent fraction of both fractional numbers with denominator 1134
For the 1st fraction, since 42 × 27 = 1134,
10/42 = 10 × 27/42 × 27 = 270/1134
Likewise, for the 2nd fraction, since 81 × 14 = 1134,
3/81 = 3 × 14/81 × 14 = 42/1134
Subtract the two like fractions:
270/1134 - 42/1134 = 270 - 42/1134 = 228/1134
After reducing the fraction, the answer is 38/189

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