Answers

Subtract 70/9 from 28/81

1^st number: 28/81, 2^nd number: 7 7/9

28/81 - 70/9 is -602/81.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 9 is 81
   
   Next, find the equivalent fraction of both fractional numbers with denominator 81
2. For the 1st fraction, since 81 × 1 = 81,
   28/81 = 28 × 1/81 × 1 = 28/81
3. Likewise, for the 2nd fraction, since 9 × 9 = 81,
   70/9 = 70 × 9/9 × 9 = 630/81
4. Subtract the two like fractions:
   28/81 - 630/81 = 28 - 630/81 = -602/81

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