Answers

Subtract 2/81 from 49/90

49/90 - 2/81 is 421/810.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 90 × 9 = 810,
   49/90 = 49 × 9/90 × 9 = 441/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   2/81 = 2 × 10/81 × 10 = 20/810
4. Subtract the two like fractions:
   441/810 - 20/810 = 441 - 20/810 = 421/810

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