Answers

Add 45/42 and 81/40

1^st number: 1 3/42, 2^nd number: 2 1/40

45/42 + 81/40 is 867/280.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 42 × 20 = 840,
   45/42 = 45 × 20/42 × 20 = 900/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   81/40 = 81 × 21/40 × 21 = 1701/840
4. Add the two like fractions:
   900/840 + 1701/840 = 900 + 1701/840 = 2601/840
5. 2601/840 simplified gives 867/280
6. So, 45/42 + 81/40 = 867/280
   In mixed form: 327/280

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