Answers

Add 3/20 and 42/60

3/20 + 42/60 is 17/20.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 20 and 60 is 60
   
   Next, find the equivalent fraction of both fractional numbers with denominator 60
2. For the 1st fraction, since 20 × 3 = 60,
   3/20 = 3 × 3/20 × 3 = 9/60
3. Likewise, for the 2nd fraction, since 60 × 1 = 60,
   42/60 = 42 × 1/60 × 1 = 42/60
4. Add the two like fractions:
   9/60 + 42/60 = 9 + 42/60 = 51/60
5. 51/60 simplified gives 17/20
6. So, 3/20 + 42/60 = 17/20

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