Answers

Subtract 90/28 from 2/90

1^st number: 2/90, 2^nd number: 3 6/28

2/90 - 90/28 is -2011/630.

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,
   2/90 = 2 × 14/90 × 14 = 28/1260
3. Likewise, for the 2nd fraction, since 28 × 45 = 1260,
   90/28 = 90 × 45/28 × 45 = 4050/1260
4. Subtract the two like fractions:
   28/1260 - 4050/1260 = 28 - 4050/1260 = -4022/1260
5. After reducing the fraction, the answer is -2011/630

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