Answers

Add 90/63 and 70/30

1^st number: 1 27/63, 2^nd number: 2 10/30

90/63 + 70/30 is 79/21.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 30 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 63 × 10 = 630,
   90/63 = 90 × 10/63 × 10 = 900/630
3. Likewise, for the 2nd fraction, since 30 × 21 = 630,
   70/30 = 70 × 21/30 × 21 = 1470/630
4. Add the two like fractions:
   900/630 + 1470/630 = 900 + 1470/630 = 2370/630
5. 2370/630 simplified gives 79/21
6. So, 90/63 + 70/30 = 79/21
   In mixed form: 316/21

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