Question 316417
Each pie represents the percentage of that data to the whole. 
In other words, if I have three salespeople selling cars.
Oprah sells 50 cars, LeBron sells 30 cars, and Ronaldo sells 20 cars, then the percentage that each sells would be
Oprah-50/(50+30+20)=50/100=50%
LeBron-30/100=30%
Ronaldo-20/100=20%
Now the whole pie is 100%. 
Oprah would have a slice that takes up 1/2 the pie since 50% is 1/2 of 100%. 
LeBron and Ronaldo would share the other 50%. 
LeBron's slice would be larger since 30% is larger than 20%. 
{{{drawing(300,300,-5,5,-5,5,circle(0,0,3),locate(-2.5,0.5,Oprah),locate(0.2,1.5,Ronaldo),locate(0.5,-1,LeBron),line(0,-3,0,3),line(2.853,0.927,0,0))}}}
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If they all sold 33 cars and each had 33% of the pie (don't worry about the other 1%), then there would be 3 equal slices of pie to represent the equal number of sales that month. 
{{{drawing(300,300,-5,5,-5,5,circle(0,0,3),locate(-2,-0.5,Oprah),locate(-1.0,1.5,Ronaldo),locate(0.5,-0.5,LeBron),line(-2.598,1.5,0),line(0,-3,0,0),line(2.598,1.50,0,0))}}}
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Remember the bigger the slice, the greater contribution to the total.
The smaller the slice, the smaller the contribution to the total. 
All pies equal 100%.