Answers

Add 72/28 and 42/20

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

72/28 + 42/20 is 327/70.

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,
   42/20 = 42 × 7/20 × 7 = 294/140
4. Add the two like fractions:
   360/140 + 294/140 = 360 + 294/140 = 654/140
5. 654/140 simplified gives 327/70
6. So, 72/28 + 42/20 = 327/70
   In mixed form: 447/70

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