Answers

Add 18/84 and 72/5

1^st number: 18/84, 2^nd number: 14 2/5

18/84 + 72/5 is 1023/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 5 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   18/84 = 18 × 5/84 × 5 = 90/420
3. Likewise, for the 2nd fraction, since 5 × 84 = 420,
   72/5 = 72 × 84/5 × 84 = 6048/420
4. Add the two like fractions:
   90/420 + 6048/420 = 90 + 6048/420 = 6138/420
5. 6138/420 simplified gives 1023/70
6. So, 18/84 + 72/5 = 1023/70
   In mixed form: 1443/70

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