Answers

Add 50/72 and 21/20

1^st number: 50/72, 2^nd number: 1 1/20

50/72 + 21/20 is 157/90.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 20 is 360
   
   Next, find the equivalent fraction of both fractional numbers with denominator 360
2. For the 1st fraction, since 72 × 5 = 360,
   50/72 = 50 × 5/72 × 5 = 250/360
3. Likewise, for the 2nd fraction, since 20 × 18 = 360,
   21/20 = 21 × 18/20 × 18 = 378/360
4. Add the two like fractions:
   250/360 + 378/360 = 250 + 378/360 = 628/360
5. 628/360 simplified gives 157/90
6. So, 50/72 + 21/20 = 157/90
   In mixed form: 167/90

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