Answers

Add 84/25 and 28/72

1^st number: 3 9/25, 2^nd number: 28/72

84/25 + 28/72 is 1687/450.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 25 and 72 is 1800
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1800
2. For the 1st fraction, since 25 × 72 = 1800,
   84/25 = 84 × 72/25 × 72 = 6048/1800
3. Likewise, for the 2nd fraction, since 72 × 25 = 1800,
   28/72 = 28 × 25/72 × 25 = 700/1800
4. Add the two like fractions:
   6048/1800 + 700/1800 = 6048 + 700/1800 = 6748/1800
5. 6748/1800 simplified gives 1687/450
6. So, 84/25 + 28/72 = 1687/450
   In mixed form: 3337/450

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