Answers

Subtract 45/12 from 56/90

1^st number: 56/90, 2^nd number: 3 9/12

56/90 - 45/12 is -563/180.

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,
   56/90 = 56 × 2/90 × 2 = 112/180
3. Likewise, for the 2nd fraction, since 12 × 15 = 180,
   45/12 = 45 × 15/12 × 15 = 675/180
4. Subtract the two like fractions:
   112/180 - 675/180 = 112 - 675/180 = -563/180

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