Answers

Subtract 2/90 from 6/81

6/81 - 2/90 is 7/135.

Steps for subtracting fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 81 and 90 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 81 × 10 = 810,
   6/81 = 6 × 10/81 × 10 = 60/810
3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
   2/90 = 2 × 9/90 × 9 = 18/810
4. Subtract the two like fractions:
   60/810 - 18/810 = 60 - 18/810 = 42/810
5. After reducing the fraction, the answer is 7/135

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