Answers

Add 6/84 and 42/40

1^st number: 6/84, 2^nd number: 1 2/40

6/84 + 42/40 is 157/140.

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,
   6/84 = 6 × 10/84 × 10 = 60/840
3. Likewise, for the 2nd fraction, since 40 × 21 = 840,
   42/40 = 42 × 21/40 × 21 = 882/840
4. Add the two like fractions:
   60/840 + 882/840 = 60 + 882/840 = 942/840
5. 942/840 simplified gives 157/140
6. So, 6/84 + 42/40 = 157/140
   In mixed form: 117/140

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