Answers

Subtract 90/28 from 45/15

1^st number: 3 0/15, 2^nd number: 3 6/28

45/15 - 90/28 is -3/14.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 15 and 28 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 15 × 28 = 420,
   45/15 = 45 × 28/15 × 28 = 1260/420
3. Likewise, for the 2nd fraction, since 28 × 15 = 420,
   90/28 = 90 × 15/28 × 15 = 1350/420
4. Subtract the two like fractions:
   1260/420 - 1350/420 = 1260 - 1350/420 = -90/420
5. After reducing the fraction, the answer is -3/14

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