Answers

Add 56/21 and 18/90

1^st number: 2 14/21, 2^nd number: 18/90

56/21 + 18/90 is 43/15.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 21 × 30 = 630,
   56/21 = 56 × 30/21 × 30 = 1680/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   18/90 = 18 × 7/90 × 7 = 126/630
4. Add the two like fractions:
   1680/630 + 126/630 = 1680 + 126/630 = 1806/630
5. 1806/630 simplified gives 43/15
6. So, 56/21 + 18/90 = 43/15
   In mixed form: 213/15

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