Answers

Subtract 90/12 from 18/90

1^st number: 18/90, 2^nd number: 7 6/12

18/90 - 90/12 is -73/10.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 12 is 180
   
   Next, find the equivalent fraction of both fractional numbers with denominator 180
2. For the 1st fraction, since 90 × 2 = 180,
   18/90 = 18 × 2/90 × 2 = 36/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   90/12 = 90 × 15/12 × 15 = 1350/180
4. Subtract the two like fractions:
   36/180 - 1350/180 = 36 - 1350/180 = -1314/180
5. After reducing the fraction, the answer is -73/10

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