Answers

Add 90/63 and 45/20

1^st number: 1 27/63, 2^nd number: 2 5/20

90/63 + 45/20 is 103/28.

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,
   45/20 = 45 × 63/20 × 63 = 2835/1260
4. Add the two like fractions:
   1800/1260 + 2835/1260 = 1800 + 2835/1260 = 4635/1260
5. 4635/1260 simplified gives 103/28
6. So, 90/63 + 45/20 = 103/28
   In mixed form: 319/28

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