Answers

Add 70/63 and 28/20

1^st number: 1 7/63, 2^nd number: 1 8/20

70/63 + 28/20 is 113/45.

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,
   28/20 = 28 × 63/20 × 63 = 1764/1260
4. Add the two like fractions:
   1400/1260 + 1764/1260 = 1400 + 1764/1260 = 3164/1260
5. 3164/1260 simplified gives 113/45
6. So, 70/63 + 28/20 = 113/45
   In mixed form: 223/45

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