Answers

Add 21/24 and 84/70

1^st number: 21/24, 2^nd number: 1 14/70

21/24 + 84/70 is 83/40.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 24 and 70 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 24 × 35 = 840,
   21/24 = 21 × 35/24 × 35 = 735/840
3. Likewise, for the 2nd fraction, since 70 × 12 = 840,
   84/70 = 84 × 12/70 × 12 = 1008/840
4. Add the two like fractions:
   735/840 + 1008/840 = 735 + 1008/840 = 1743/840
5. 1743/840 simplified gives 83/40
6. So, 21/24 + 84/70 = 83/40
   In mixed form: 23/40

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