Answers

Add 50/72 and 50/21

1^st number: 50/72, 2^nd number: 2 8/21

50/72 + 50/21 is 775/252.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 72 and 21 is 504
   
   Next, find the equivalent fraction of both fractional numbers with denominator 504
2. For the 1st fraction, since 72 × 7 = 504,
   50/72 = 50 × 7/72 × 7 = 350/504
3. Likewise, for the 2nd fraction, since 21 × 24 = 504,
   50/21 = 50 × 24/21 × 24 = 1200/504
4. Add the two like fractions:
   350/504 + 1200/504 = 350 + 1200/504 = 1550/504
5. 1550/504 simplified gives 775/252
6. So, 50/72 + 50/21 = 775/252
   In mixed form: 319/252

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