Answers

Add 2/20 and 72/63

1^st number: 2/20, 2^nd number: 1 9/63

2/20 + 72/63 is 87/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 63 is 1260
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1260
2. For the 1st fraction, since 20 × 63 = 1260,
   2/20 = 2 × 63/20 × 63 = 126/1260
3. Likewise, for the 2nd fraction, since 63 × 20 = 1260,
   72/63 = 72 × 20/63 × 20 = 1440/1260
4. Add the two like fractions:
   126/1260 + 1440/1260 = 126 + 1440/1260 = 1566/1260
5. 1566/1260 simplified gives 87/70
6. So, 2/20 + 72/63 = 87/70
   In mixed form: 117/70

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