Answers

Add 56/20 and 90/72

1^st number: 2 16/20, 2^nd number: 1 18/72

56/20 + 90/72 is 81/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 72 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 20 × 18 = 360,
   56/20 = 56 × 18/20 × 18 = 1008/360
3. Likewise, for the 2nd fraction, since 72 × 5 = 360,
   90/72 = 90 × 5/72 × 5 = 450/360
4. Add the two like fractions:
   1008/360 + 450/360 = 1008 + 450/360 = 1458/360
5. 1458/360 simplified gives 81/20
6. So, 56/20 + 90/72 = 81/20
   In mixed form: 41/20

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