Answers

Add 72/28 and 7/20

1^st number: 2 16/28, 2^nd number: 7/20

72/28 + 7/20 is 409/140.

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,
   72/28 = 72 × 5/28 × 5 = 360/140
3. Likewise, for the 2nd fraction, since 20 × 7 = 140,
   7/20 = 7 × 7/20 × 7 = 49/140
4. Add the two like fractions:
   360/140 + 49/140 = 360 + 49/140 = 409/140
5. So, 72/28 + 7/20 = 409/140
   In mixed form: 2129/140

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