Answers

Add 12/84 and 42/40

1^st number: 12/84, 2^nd number: 1 2/40

12/84 + 42/40 is 167/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 40 is 840
   
   Next, find the equivalent fraction of both fractional numbers with denominator 840
2. For the 1st fraction, since 84 × 10 = 840,
   12/84 = 12 × 10/84 × 10 = 120/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   42/40 = 42 × 21/40 × 21 = 882/840
4. Add the two like fractions:
   120/840 + 882/840 = 120 + 882/840 = 1002/840
5. 1002/840 simplified gives 167/140
6. So, 12/84 + 42/40 = 167/140
   In mixed form: 127/140

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