Answers

Subtract 72/63 from 7/84

1^st number: 7/84, 2^nd number: 1 9/63

7/84 - 72/63 is -89/84.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 63 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 84 × 3 = 252,
   7/84 = 7 × 3/84 × 3 = 21/252
3. Likewise, for the 2nd fraction, since 63 × 4 = 252,
   72/63 = 72 × 4/63 × 4 = 288/252
4. Subtract the two like fractions:
   21/252 - 288/252 = 21 - 288/252 = -267/252
5. After reducing the fraction, the answer is -89/84

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