Answers

Subtract 3/81 from 21/35

21/35 - 3/81 is 76/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 81 is 2835
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2835
2. For the 1st fraction, since 35 × 81 = 2835,
   21/35 = 21 × 81/35 × 81 = 1701/2835
3. Likewise, for the 2nd fraction, since 81 × 35 = 2835,
   3/81 = 3 × 35/81 × 35 = 105/2835
4. Subtract the two like fractions:
   1701/2835 - 105/2835 = 1701 - 105/2835 = 1596/2835
5. After reducing the fraction, the answer is 76/135

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