Answers

Add 84/12 and 75/40

1^st number: 7 0/12, 2^nd number: 1 35/40

84/12 + 75/40 is 71/8.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 12 and 40 is 120
   
   Next, find the equivalent fraction of both fractional numbers with denominator 120
2. For the 1st fraction, since 12 × 10 = 120,
   84/12 = 84 × 10/12 × 10 = 840/120
3. Likewise, for the 2nd fraction, since 40 × 3 = 120,
   75/40 = 75 × 3/40 × 3 = 225/120
4. Add the two like fractions:
   840/120 + 225/120 = 840 + 225/120 = 1065/120
5. 1065/120 simplified gives 71/8
6. So, 84/12 + 75/40 = 71/8
   In mixed form: 87/8

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