Answers

Add 63/35 and 20/90

1^st number: 1 28/35, 2^nd number: 20/90

63/35 + 20/90 is 91/45.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 35 and 90 is 630
   
   Next, find the equivalent fraction of both fractional numbers with denominator 630
2. For the 1st fraction, since 35 × 18 = 630,
   63/35 = 63 × 18/35 × 18 = 1134/630
3. Likewise, for the 2nd fraction, since 90 × 7 = 630,
   20/90 = 20 × 7/90 × 7 = 140/630
4. Add the two like fractions:
   1134/630 + 140/630 = 1134 + 140/630 = 1274/630
5. 1274/630 simplified gives 91/45
6. So, 63/35 + 20/90 = 91/45
   In mixed form: 21/45

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