Answers

Add 20/42 and 21/28

20/42 + 21/28 is 103/84.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 42 and 28 is 84
   
   Next, find the equivalent fraction of both fractional numbers with denominator 84
2. For the 1st fraction, since 42 × 2 = 84,
   20/42 = 20 × 2/42 × 2 = 40/84
3. Likewise, for the 2nd fraction, since 28 × 3 = 84,
   21/28 = 21 × 3/28 × 3 = 63/84
4. Add the two like fractions:
   40/84 + 63/84 = 40 + 63/84 = 103/84
5. So, 20/42 + 21/28 = 103/84
   In mixed form: 119/84

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