Answers

Subtract 42/36 from 72/63

1^st number: 1 9/63, 2^nd number: 1 6/36

72/63 - 42/36 is -1/42.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 36 is 252
   
   Next, find the equivalent fraction of both fractional numbers with denominator 252
2. For the 1st fraction, since 63 × 4 = 252,
   72/63 = 72 × 4/63 × 4 = 288/252
3. Likewise, for the 2nd fraction, since 36 × 7 = 252,
   42/36 = 42 × 7/36 × 7 = 294/252
4. Subtract the two like fractions:
   288/252 - 294/252 = 288 - 294/252 = -6/252
5. After reducing the fraction, the answer is -1/42

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