Answers

Subtract 10/90 from 2/81

2/81 - 10/90 is -7/81.

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,
   2/81 = 2 × 10/81 × 10 = 20/810
3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
   10/90 = 10 × 9/90 × 9 = 90/810
4. Subtract the two like fractions:
   20/810 - 90/810 = 20 - 90/810 = -70/810
5. After reducing the fraction, the answer is -7/81

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