Answers

Add 20/84 and 12/20

20/84 + 12/20 is 88/105.

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,
   20/84 = 20 × 5/84 × 5 = 100/420
3. Likewise, for the 2nd fraction, since 20 × 21 = 420,
   12/20 = 12 × 21/20 × 21 = 252/420
4. Add the two like fractions:
   100/420 + 252/420 = 100 + 252/420 = 352/420
5. 352/420 simplified gives 88/105
6. So, 20/84 + 12/20 = 88/105

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