Answers

Add 70/63 and 9/20

1^st number: 1 7/63, 2^nd number: 9/20

70/63 + 9/20 is 281/180.

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,
   70/63 = 70 × 20/63 × 20 = 1400/1260
3. Likewise, for the 2nd fraction, since 20 × 63 = 1260,
   9/20 = 9 × 63/20 × 63 = 567/1260
4. Add the two like fractions:
   1400/1260 + 567/1260 = 1400 + 567/1260 = 1967/1260
5. 1967/1260 simplified gives 281/180
6. So, 70/63 + 9/20 = 281/180
   In mixed form: 1101/180

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