Answers

Subtract 21/81 from 3/35

3/35 - 21/81 is -164/945.

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,
   3/35 = 3 × 81/35 × 81 = 243/2835
3. Likewise, for the 2nd fraction, since 81 × 35 = 2835,
   21/81 = 21 × 35/81 × 35 = 735/2835
4. Subtract the two like fractions:
   243/2835 - 735/2835 = 243 - 735/2835 = -492/2835
5. After reducing the fraction, the answer is -164/945

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