Answers

Add 72/21 and 70/4

1^st number: 3 9/21, 2^nd number: 17 2/4

72/21 + 70/4 is 293/14.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 4 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 21 × 4 = 84,
   72/21 = 72 × 4/21 × 4 = 288/84
3. Likewise, for the 2nd fraction, since 4 × 21 = 84,
   70/4 = 70 × 21/4 × 21 = 1470/84
4. Add the two like fractions:
   288/84 + 1470/84 = 288 + 1470/84 = 1758/84
5. 1758/84 simplified gives 293/14
6. So, 72/21 + 70/4 = 293/14
   In mixed form: 2013/14

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