Answers

Add 30/28 and 15/72

1^st number: 1 2/28, 2^nd number: 15/72

30/28 + 15/72 is 215/168.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 28 and 72 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 28 × 18 = 504,
   30/28 = 30 × 18/28 × 18 = 540/504
3. Likewise, for the 2nd fraction, since 72 × 7 = 504,
   15/72 = 15 × 7/72 × 7 = 105/504
4. Add the two like fractions:
   540/504 + 105/504 = 540 + 105/504 = 645/504
5. 645/504 simplified gives 215/168
6. So, 30/28 + 15/72 = 215/168
   In mixed form: 147/168

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