Answers

Add 90/63 and 28/20

1^st number: 1 27/63, 2^nd number: 1 8/20

90/63 + 28/20 is 99/35.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 63 and 20 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 63 × 20 = 1260,
   90/63 = 90 × 20/63 × 20 = 1800/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   28/20 = 28 × 63/20 × 63 = 1764/1260
4. Add the two like fractions:
   1800/1260 + 1764/1260 = 1800 + 1764/1260 = 3564/1260
5. 3564/1260 simplified gives 99/35
6. So, 90/63 + 28/20 = 99/35
   In mixed form: 229/35

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