Answers

Add 90/21 and 42/50

1^st number: 4 6/21, 2^nd number: 42/50

90/21 + 42/50 is 897/175.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 50 is 1050
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1050
2. For the 1st fraction, since 21 × 50 = 1050,
   90/21 = 90 × 50/21 × 50 = 4500/1050
3. Likewise, for the 2nd fraction, since 50 × 21 = 1050,
   42/50 = 42 × 21/50 × 21 = 882/1050
4. Add the two like fractions:
   4500/1050 + 882/1050 = 4500 + 882/1050 = 5382/1050
5. 5382/1050 simplified gives 897/175
6. So, 90/21 + 42/50 = 897/175
   In mixed form: 522/175

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