Answers

Add 12/84 and 45/80

12/84 + 45/80 is 79/112.

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,
   12/84 = 12 × 20/84 × 20 = 240/1680
3. Likewise, for the 2nd fraction, since 80 × 21 = 1680,
   45/80 = 45 × 21/80 × 21 = 945/1680
4. Add the two like fractions:
   240/1680 + 945/1680 = 240 + 945/1680 = 1185/1680
5. 1185/1680 simplified gives 79/112
6. So, 12/84 + 45/80 = 79/112

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