Answers

Subtract 70/54 from 42/81

1^st number: 42/81, 2^nd number: 1 16/54

42/81 - 70/54 is -7/9.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 54 is 162
   
   Next, find the equivalent fraction of both fractional numbers with denominator 162
2. For the 1st fraction, since 81 × 2 = 162,
   42/81 = 42 × 2/81 × 2 = 84/162
3. Likewise, for the 2nd fraction, since 54 × 3 = 162,
   70/54 = 70 × 3/54 × 3 = 210/162
4. Subtract the two like fractions:
   84/162 - 210/162 = 84 - 210/162 = -126/162
5. After reducing the fraction, the answer is -7/9

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