Answers

Subtract 20/8 from 70/81

1^st number: 70/81, 2^nd number: 2 4/8

70/81 - 20/8 is -265/162.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 8 is 648
   
   Next, find the equivalent fraction of both fractional numbers with denominator 648
2. For the 1st fraction, since 81 × 8 = 648,
   70/81 = 70 × 8/81 × 8 = 560/648
3. Likewise, for the 2nd fraction, since 8 × 81 = 648,
   20/8 = 20 × 81/8 × 81 = 1620/648
4. Subtract the two like fractions:
   560/648 - 1620/648 = 560 - 1620/648 = -1060/648
5. After reducing the fraction, the answer is -265/162

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