Answers

Add 21/30 and 60/81

21/30 + 60/81 is 389/270.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 30 and 81 is 810
   
   Next, find the equivalent fraction of both fractional numbers with denominator 810
2. For the 1st fraction, since 30 × 27 = 810,
   21/30 = 21 × 27/30 × 27 = 567/810
3. Likewise, for the 2nd fraction, since 81 × 10 = 810,
   60/81 = 60 × 10/81 × 10 = 600/810
4. Add the two like fractions:
   567/810 + 600/810 = 567 + 600/810 = 1167/810
5. 1167/810 simplified gives 389/270
6. So, 21/30 + 60/81 = 389/270
   In mixed form: 1119/270

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