Answers

Subtract 4/7 from 18/42

18/42 - 4/7 is -1/7.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 7 is 42
   
   Next, find the equivalent fraction of both fractional numbers with denominator 42
2. For the 1st fraction, since 42 × 1 = 42,
   18/42 = 18 × 1/42 × 1 = 18/42
3. Likewise, for the 2nd fraction, since 7 × 6 = 42,
   4/7 = 4 × 6/7 × 6 = 24/42
4. Subtract the two like fractions:
   18/42 - 24/42 = 18 - 24/42 = -6/42
5. After reducing the fraction, the answer is -1/7

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