Answers

Subtract 63/84 from 36/90

36/90 - 63/84 is -7/20.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 84 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 90 × 14 = 1260,
   36/90 = 36 × 14/90 × 14 = 504/1260
3. Likewise, for the 2nd fraction, since 84 × 15 = 1260,
   63/84 = 63 × 15/84 × 15 = 945/1260
4. Subtract the two like fractions:
   504/1260 - 945/1260 = 504 - 945/1260 = -441/1260
5. After reducing the fraction, the answer is -7/20

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