Answers

Subtract 10/84 from 42/81

42/81 - 10/84 is 151/378.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 84 is 2268
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2268
2. For the 1st fraction, since 81 × 28 = 2268,
   42/81 = 42 × 28/81 × 28 = 1176/2268
3. Likewise, for the 2nd fraction, since 84 × 27 = 2268,
   10/84 = 10 × 27/84 × 27 = 270/2268
4. Subtract the two like fractions:
   1176/2268 - 270/2268 = 1176 - 270/2268 = 906/2268
5. After reducing the fraction, the answer is 151/378

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