Answers

Add 81/40 and 21/50

1^st number: 2 1/40, 2^nd number: 21/50

81/40 + 21/50 is 489/200.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 40 and 50 is 200
   
   Next, find the equivalent fraction of both fractional numbers with denominator 200
2. For the 1st fraction, since 40 × 5 = 200,
   81/40 = 81 × 5/40 × 5 = 405/200
3. Likewise, for the 2nd fraction, since 50 × 4 = 200,
   21/50 = 21 × 4/50 × 4 = 84/200
4. Add the two like fractions:
   405/200 + 84/200 = 405 + 84/200 = 489/200
5. So, 81/40 + 21/50 = 489/200
   In mixed form: 289/200

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