Answers

Add 72/20 and 98/56

1^st number: 3 12/20, 2^nd number: 1 42/56

72/20 + 98/56 is 107/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 56 is 280
   
   Next, find the equivalent fraction of both fractional numbers with denominator 280
2. For the 1st fraction, since 20 × 14 = 280,
   72/20 = 72 × 14/20 × 14 = 1008/280
3. Likewise, for the 2nd fraction, since 56 × 5 = 280,
   98/56 = 98 × 5/56 × 5 = 490/280
4. Add the two like fractions:
   1008/280 + 490/280 = 1008 + 490/280 = 1498/280
5. 1498/280 simplified gives 107/20
6. So, 72/20 + 98/56 = 107/20
   In mixed form: 57/20

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