Answers

Subtract 63/4 from 25/90

1^st number: 25/90, 2^nd number: 15 3/4

25/90 - 63/4 is -557/36.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 4 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 4 × 45 = 180,
   63/4 = 63 × 45/4 × 45 = 2835/180
4. Subtract the two like fractions:
   50/180 - 2835/180 = 50 - 2835/180 = -2785/180
5. After reducing the fraction, the answer is -557/36

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