Answers

Subtract 42/90 from 12/9

1^st number: 1 3/9, 2^nd number: 42/90

12/9 - 42/90 is 13/15.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 9 and 90 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 9 × 10 = 90,
   12/9 = 12 × 10/9 × 10 = 120/90
3. Likewise, for the 2nd fraction, since 90 × 1 = 90,
   42/90 = 42 × 1/90 × 1 = 42/90
4. Subtract the two like fractions:
   120/90 - 42/90 = 120 - 42/90 = 78/90
5. After reducing the fraction, the answer is 13/15

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