Answers

Subtract 63/28 from 75/90

1^st number: 75/90, 2^nd number: 2 7/28

75/90 - 63/28 is -17/12.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 28 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 90 × 14 = 1260,
   75/90 = 75 × 14/90 × 14 = 1050/1260
3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
   63/28 = 63 × 45/28 × 45 = 2835/1260
4. Subtract the two like fractions:
   1050/1260 - 2835/1260 = 1050 - 2835/1260 = -1785/1260
5. After reducing the fraction, the answer is -17/12

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