Answers

Add 54/81 and 6/90

54/81 + 6/90 is 11/15.

Steps for adding 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,
   54/81 = 54 × 10/81 × 10 = 540/810
3. Likewise, for the 2nd fraction, since 90 × 9 = 810,
   6/90 = 6 × 9/90 × 9 = 54/810
4. Add the two like fractions:
   540/810 + 54/810 = 540 + 54/810 = 594/810
5. 594/810 simplified gives 11/15
6. So, 54/81 + 6/90 = 11/15

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