Answers

Subtract 40/35 from 20/81

1^st number: 20/81, 2^nd number: 1 5/35

20/81 - 40/35 is -508/567.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 35 is 2835
   
   Next, find the equivalent fraction of both fractional numbers with denominator 2835
2. For the 1st fraction, since 81 × 35 = 2835,
   20/81 = 20 × 35/81 × 35 = 700/2835
3. Likewise, for the 2nd fraction, since 35 × 81 = 2835,
   40/35 = 40 × 81/35 × 81 = 3240/2835
4. Subtract the two like fractions:
   700/2835 - 3240/2835 = 700 - 3240/2835 = -2540/2835
5. After reducing the fraction, the answer is -508/567

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