Answers

Add 16/42 and 54/40

1^st number: 16/42, 2^nd number: 1 14/40

16/42 + 54/40 is 727/420.

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,
   16/42 = 16 × 20/42 × 20 = 320/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   54/40 = 54 × 21/40 × 21 = 1134/840
4. Add the two like fractions:
   320/840 + 1134/840 = 320 + 1134/840 = 1454/840
5. 1454/840 simplified gives 727/420
6. So, 16/42 + 54/40 = 727/420
   In mixed form: 1307/420

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