Answers

Add 21/10 and 20/18

1^st number: 2 1/10, 2^nd number: 1 2/18

21/10 + 20/18 is 289/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 10 and 18 is 90
   
   Next, find the equivalent fraction of both fractional numbers with denominator 90
2. For the 1st fraction, since 10 × 9 = 90,
   21/10 = 21 × 9/10 × 9 = 189/90
3. Likewise, for the 2nd fraction, since 18 × 5 = 90,
   20/18 = 20 × 5/18 × 5 = 100/90
4. Add the two like fractions:
   189/90 + 100/90 = 189 + 100/90 = 289/90
5. So, 21/10 + 20/18 = 289/90
   In mixed form: 319/90

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