Answers

Subtract 60/42 from 45/72

1^st number: 45/72, 2^nd number: 1 18/42

45/72 - 60/42 is -45/56.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 42 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   45/72 = 45 × 7/72 × 7 = 315/504
3. Likewise, for the 2nd fraction, since 42 × 12 = 504,
   60/42 = 60 × 12/42 × 12 = 720/504
4. Subtract the two like fractions:
   315/504 - 720/504 = 315 - 720/504 = -405/504
5. After reducing the fraction, the answer is -45/56

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