Answers

Subtract 28/72 from 28/84

28/84 - 28/72 is -1/18.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 84 × 6 = 504,
   28/84 = 28 × 6/84 × 6 = 168/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   28/72 = 28 × 7/72 × 7 = 196/504
4. Subtract the two like fractions:
   168/504 - 196/504 = 168 - 196/504 = -28/504
5. After reducing the fraction, the answer is -1/18

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