Answers

Add 63/84 and 12/80

63/84 + 12/80 is 9/10.

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,
   63/84 = 63 × 20/84 × 20 = 1260/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   12/80 = 12 × 21/80 × 21 = 252/1680
4. Add the two like fractions:
   1260/1680 + 252/1680 = 1260 + 252/1680 = 1512/1680
5. 1512/1680 simplified gives 9/10
6. So, 63/84 + 12/80 = 9/10

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