Answers

Subtract 42/12 from 25/90

1^st number: 25/90, 2^nd number: 3 6/12

25/90 - 42/12 is -29/9.

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,
   25/90 = 25 × 2/90 × 2 = 50/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   42/12 = 42 × 15/12 × 15 = 630/180
4. Subtract the two like fractions:
   50/180 - 630/180 = 50 - 630/180 = -580/180
5. After reducing the fraction, the answer is -29/9

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