Answers

Subtract 90/81 from 4/56

1^st number: 4/56, 2^nd number: 1 9/81

4/56 - 90/81 is -131/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 81 is 4536
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4536
2. For the 1st fraction, since 56 × 81 = 4536,
   4/56 = 4 × 81/56 × 81 = 324/4536
3. Likewise, for the 2nd fraction, since 81 × 56 = 4536,
   90/81 = 90 × 56/81 × 56 = 5040/4536
4. Subtract the two like fractions:
   324/4536 - 5040/4536 = 324 - 5040/4536 = -4716/4536
5. After reducing the fraction, the answer is -131/126

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