Answers

Subtract 63/84 from 18/72

18/72 - 63/84 is -1/2.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 84 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   18/72 = 18 × 7/72 × 7 = 126/504
3. Likewise, for the 2nd fraction, since 84 × 6 = 504,
   63/84 = 63 × 6/84 × 6 = 378/504
4. Subtract the two like fractions:
   126/504 - 378/504 = 126 - 378/504 = -252/504
5. After reducing the fraction, the answer is -1/2

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