Answers

Subtract 90/72 from 12/75

1^st number: 12/75, 2^nd number: 1 18/72

12/75 - 90/72 is -109/100.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 75 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 75 × 24 = 1800,
   12/75 = 12 × 24/75 × 24 = 288/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   90/72 = 90 × 25/72 × 25 = 2250/1800
4. Subtract the two like fractions:
   288/1800 - 2250/1800 = 288 - 2250/1800 = -1962/1800
5. After reducing the fraction, the answer is -109/100

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