Answers

Add 2/84 and 21/80

2/84 + 21/80 is 481/1680.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 80 is 1680
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1680
2. For the 1st fraction, since 84 × 20 = 1680,
   2/84 = 2 × 20/84 × 20 = 40/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   21/80 = 21 × 21/80 × 21 = 441/1680
4. Add the two like fractions:
   40/1680 + 441/1680 = 40 + 441/1680 = 481/1680
5. So, 2/84 + 21/80 = 481/1680

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