Answers

Add 96/21 and 84/40

1^st number: 4 12/21, 2^nd number: 2 4/40

96/21 + 84/40 is 467/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 21 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 21 × 40 = 840,
   96/21 = 96 × 40/21 × 40 = 3840/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   84/40 = 84 × 21/40 × 21 = 1764/840
4. Add the two like fractions:
   3840/840 + 1764/840 = 3840 + 1764/840 = 5604/840
5. 5604/840 simplified gives 467/70
6. So, 96/21 + 84/40 = 467/70
   In mixed form: 647/70

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