Answers

Subtract 15/45 from 90/28

1^st number: 3 6/28, 2^nd number: 15/45

90/28 - 15/45 is 121/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 28 × 45 = 1260,
   90/28 = 90 × 45/28 × 45 = 4050/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   15/45 = 15 × 28/45 × 28 = 420/1260
4. Subtract the two like fractions:
   4050/1260 - 420/1260 = 4050 - 420/1260 = 3630/1260
5. After reducing the fraction, the answer is 121/42
6. In mixed form: 237/42

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