Answers

Add 42/50 and 72/21

1^st number: 42/50, 2^nd number: 3 9/21

42/50 + 72/21 is 747/175.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 50 and 21 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 50 × 21 = 1050,
   42/50 = 42 × 21/50 × 21 = 882/1050
3. Likewise, for the 2nd fraction, since 21 × 50 = 1050,
   72/21 = 72 × 50/21 × 50 = 3600/1050
4. Add the two like fractions:
   882/1050 + 3600/1050 = 882 + 3600/1050 = 4482/1050
5. 4482/1050 simplified gives 747/175
6. So, 42/50 + 72/21 = 747/175
   In mixed form: 447/175

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