Answers

Add 84/63 and 4/90

1^st number: 1 21/63, 2^nd number: 4/90

84/63 + 4/90 is 62/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   84/63 = 84 × 10/63 × 10 = 840/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   4/90 = 4 × 7/90 × 7 = 28/630
4. Add the two like fractions:
   840/630 + 28/630 = 840 + 28/630 = 868/630
5. 868/630 simplified gives 62/45
6. So, 84/63 + 4/90 = 62/45
   In mixed form: 117/45

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