Answers

Add 90/63 and 3/20

1^st number: 1 27/63, 2^nd number: 3/20

90/63 + 3/20 is 221/140.

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,
   3/20 = 3 × 63/20 × 63 = 189/1260
4. Add the two like fractions:
   1800/1260 + 189/1260 = 1800 + 189/1260 = 1989/1260
5. 1989/1260 simplified gives 221/140
6. So, 90/63 + 3/20 = 221/140
   In mixed form: 181/140

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