Answers

Subtract 90/75 from 18/56

1^st number: 18/56, 2^nd number: 1 15/75

18/56 - 90/75 is -123/140.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 56 and 75 is 4200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4200
2. For the 1st fraction, since 56 × 75 = 4200,
   18/56 = 18 × 75/56 × 75 = 1350/4200
3. Likewise, for the 2nd fraction, since 75 × 56 = 4200,
   90/75 = 90 × 56/75 × 56 = 5040/4200
4. Subtract the two like fractions:
   1350/4200 - 5040/4200 = 1350 - 5040/4200 = -3690/4200
5. After reducing the fraction, the answer is -123/140

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