Answers

Subtract 42/75 from 1/18

1/18 - 42/75 is -227/450.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 18 and 75 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 18 × 25 = 450,
   1/18 = 1 × 25/18 × 25 = 25/450
3. Likewise, for the 2nd fraction, since 75 × 6 = 450,
   42/75 = 42 × 6/75 × 6 = 252/450
4. Subtract the two like fractions:
   25/450 - 252/450 = 25 - 252/450 = -227/450

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