Answers

Subtract 3/81 from 42/50

42/50 - 3/81 is 542/675.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 81 is 4050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 4050
2. For the 1st fraction, since 50 × 81 = 4050,
   42/50 = 42 × 81/50 × 81 = 3402/4050
3. Likewise, for the 2nd fraction, since 81 × 50 = 4050,
   3/81 = 3 × 50/81 × 50 = 150/4050
4. Subtract the two like fractions:
   3402/4050 - 150/4050 = 3402 - 150/4050 = 3252/4050
5. After reducing the fraction, the answer is 542/675

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