Answers

Add 98/90 and 90/21

1^st number: 1 8/90, 2^nd number: 4 6/21

98/90 + 90/21 is 1693/315.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 90 and 21 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 90 × 7 = 630,
   98/90 = 98 × 7/90 × 7 = 686/630
3. Likewise, for the 2nd fraction, since 21 × 30 = 630,
   90/21 = 90 × 30/21 × 30 = 2700/630
4. Add the two like fractions:
   686/630 + 2700/630 = 686 + 2700/630 = 3386/630
5. 3386/630 simplified gives 1693/315
6. So, 98/90 + 90/21 = 1693/315
   In mixed form: 5118/315

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