Answers

Add 9/84 and 6/20

9/84 + 6/20 is 57/140.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 20 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   9/84 = 9 × 5/84 × 5 = 45/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   6/20 = 6 × 21/20 × 21 = 126/420
4. Add the two like fractions:
   45/420 + 126/420 = 45 + 126/420 = 171/420
5. 171/420 simplified gives 57/140
6. So, 9/84 + 6/20 = 57/140

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