Answers

Add 63/70 and 28/20

1^st number: 63/70, 2^nd number: 1 8/20

63/70 + 28/20 is 23/10.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 70 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 70 × 2 = 140,
   63/70 = 63 × 2/70 × 2 = 126/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   28/20 = 28 × 7/20 × 7 = 196/140
4. Add the two like fractions:
   126/140 + 196/140 = 126 + 196/140 = 322/140
5. 322/140 simplified gives 23/10
6. So, 63/70 + 28/20 = 23/10
   In mixed form: 23/10

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