Answers

Add 63/7 and 21/90

1^st number: 9 0/7, 2^nd number: 21/90

63/7 + 21/90 is 277/30.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 7 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 7 × 90 = 630,
   63/7 = 63 × 90/7 × 90 = 5670/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   21/90 = 21 × 7/90 × 7 = 147/630
4. Add the two like fractions:
   5670/630 + 147/630 = 5670 + 147/630 = 5817/630
5. 5817/630 simplified gives 277/30
6. So, 63/7 + 21/90 = 277/30
   In mixed form: 97/30

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