Answers

Subtract 4/72 from 4/42

4/42 - 4/72 is 5/126.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 42 × 12 = 504,
   4/42 = 4 × 12/42 × 12 = 48/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   4/72 = 4 × 7/72 × 7 = 28/504
4. Subtract the two like fractions:
   48/504 - 28/504 = 48 - 28/504 = 20/504
5. After reducing the fraction, the answer is 5/126

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