Answers

Add 70/28 and 21/20

1^st number: 2 14/28, 2^nd number: 1 1/20

70/28 + 21/20 is 71/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 20 is 140
   
   Next, find the equivalent fraction of both fractional numbers with denominator 140
2. For the 1st fraction, since 28 × 5 = 140,
   70/28 = 70 × 5/28 × 5 = 350/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   21/20 = 21 × 7/20 × 7 = 147/140
4. Add the two like fractions:
   350/140 + 147/140 = 350 + 147/140 = 497/140
5. 497/140 simplified gives 71/20
6. So, 70/28 + 21/20 = 71/20
   In mixed form: 311/20

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