Answers

Subtract 42/90 from 16/54

16/54 - 42/90 is -23/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 54 and 90 is 270
   
   Next, find the equivalent fraction of both fractional numbers with denominator 270
2. For the 1st fraction, since 54 × 5 = 270,
   16/54 = 16 × 5/54 × 5 = 80/270
3. Likewise, for the 2nd fraction, since 90 × 3 = 270,
   42/90 = 42 × 3/90 × 3 = 126/270
4. Subtract the two like fractions:
   80/270 - 126/270 = 80 - 126/270 = -46/270
5. After reducing the fraction, the answer is -23/135

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