Answers

Add 90/63 and 90/20

1^st number: 1 27/63, 2^nd number: 4 10/20

90/63 + 90/20 is 83/14.

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,
   90/20 = 90 × 63/20 × 63 = 5670/1260
4. Add the two like fractions:
   1800/1260 + 5670/1260 = 1800 + 5670/1260 = 7470/1260
5. 7470/1260 simplified gives 83/14
6. So, 90/63 + 90/20 = 83/14
   In mixed form: 513/14

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