Answers

Add 70/63 and 21/20

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

70/63 + 21/20 is 389/180.

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,
   21/20 = 21 × 63/20 × 63 = 1323/1260
4. Add the two like fractions:
   1400/1260 + 1323/1260 = 1400 + 1323/1260 = 2723/1260
5. 2723/1260 simplified gives 389/180
6. So, 70/63 + 21/20 = 389/180
   In mixed form: 229/180

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