Answers

Subtract 15/45 from 2/84

2/84 - 15/45 is -13/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 45 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 84 × 15 = 1260,
   2/84 = 2 × 15/84 × 15 = 30/1260
3. Likewise, for the 2nd fraction, since 45 × 28 = 1260,
   15/45 = 15 × 28/45 × 28 = 420/1260
4. Subtract the two like fractions:
   30/1260 - 420/1260 = 30 - 420/1260 = -390/1260
5. After reducing the fraction, the answer is -13/42

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