Answers

Subtract 75/42 from 8/90

1^st number: 8/90, 2^nd number: 1 33/42

8/90 - 75/42 is -1069/630.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 42 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   8/90 = 8 × 7/90 × 7 = 56/630
3. Likewise, for the 2nd fraction, since 42 × 15 = 630,
   75/42 = 75 × 15/42 × 15 = 1125/630
4. Subtract the two like fractions:
   56/630 - 1125/630 = 56 - 1125/630 = -1069/630

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