Answers

Add 72/4 and 70/21

1^st number: 18 0/4, 2^nd number: 3 7/21

72/4 + 70/21 is 64/3.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 4 and 21 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 4 × 21 = 84,
   72/4 = 72 × 21/4 × 21 = 1512/84
3. Likewise, for the 2nd fraction, since 21 × 4 = 84,
   70/21 = 70 × 4/21 × 4 = 280/84
4. Add the two like fractions:
   1512/84 + 280/84 = 1512 + 280/84 = 1792/84
5. 1792/84 simplified gives 64/3
6. So, 72/4 + 70/21 = 64/3
   In mixed form: 211/3

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