Express The Fractions 3/4, 7/16, And 5/8 With LCD?

To find the Least common denominator, find the multiples of each denominator. The smallest number which will appear in each list will be LCD.

Multiples of 4 are 8, 12, 16, 20, 24, 28, 32,...
Multiples of 16 are 32, 48, 64, 80, ,...
Multiples of 8 are 16, 24, 32, 40, 48,....
Here 32 is the smallest number appeared in each list. So LCD of 3/4, 7/16, And 5/8 is 32. 

2 | 4,16,8
2 | 2,8,4
2 | 1,4,2
2 | 1, 2, 1
   | 1,1,1
 
LCD = 2x2x2x2 =16

•  3/4 = 12/16 (multiply Numerator and denominator by 4)
• 7/16 = 7/16 (multiply Numerator and denominator by 1)
• 5/8 =10/16 (multiply  Numerator and denominator by 2)

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24/32,14/32,24/32

The sum of 1/6, 2/3 and 1/4 is?