Answers

Subtract 90/18 from 42/75

1^st number: 42/75, 2^nd number: 5 0/18

42/75 - 90/18 is -111/25.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 18 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 75 × 6 = 450,
   42/75 = 42 × 6/75 × 6 = 252/450
3. Likewise, for the 2nd fraction, since 18 × 25 = 450,
   90/18 = 90 × 25/18 × 25 = 2250/450
4. Subtract the two like fractions:
   252/450 - 2250/450 = 252 - 2250/450 = -1998/450
5. After reducing the fraction, the answer is -111/25

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