Answers

Subtract 49/50 from 42/90

42/90 - 49/50 is -77/150.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 50 is 450
   
   Next, find the equivalent fraction of both fractional numbers with denominator 450
2. For the 1st fraction, since 90 × 5 = 450,
   42/90 = 42 × 5/90 × 5 = 210/450
3. Likewise, for the 2nd fraction, since 50 × 9 = 450,
   49/50 = 49 × 9/50 × 9 = 441/450
4. Subtract the two like fractions:
   210/450 - 441/450 = 210 - 441/450 = -231/450
5. After reducing the fraction, the answer is -77/150

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