Answers

Add 12/42 and 42/60

12/42 + 42/60 is 69/70.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 60 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 42 × 10 = 420,
   12/42 = 12 × 10/42 × 10 = 120/420
3. Likewise, for the 2nd fraction, since 60 × 7 = 420,
   42/60 = 42 × 7/60 × 7 = 294/420
4. Add the two like fractions:
   120/420 + 294/420 = 120 + 294/420 = 414/420
5. 414/420 simplified gives 69/70
6. So, 12/42 + 42/60 = 69/70

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