Answers

Add 21/90 and 70/9

1^st number: 21/90, 2^nd number: 7 7/9

21/90 + 70/9 is 721/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 9 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 90 × 1 = 90,
   21/90 = 21 × 1/90 × 1 = 21/90
3. Likewise, for the 2nd fraction, since 9 × 10 = 90,
   70/9 = 70 × 10/9 × 10 = 700/90
4. Add the two like fractions:
   21/90 + 700/90 = 21 + 700/90 = 721/90
5. So, 21/90 + 70/9 = 721/90
   In mixed form: 81/90

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