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About becoming a personal trainer

Recently I've had a few clients come back after a year or even two years away. This made me go and look at my numbers again.

I've trained 66 different people.
10 have been 50% my PT income
25 have been 80%
36 have been 90%
I could never have dealt with 30 of them and only lost 10% income.


All the biggest headaches were in the bottom 20%, too.

33 of the 66 lasted 6 months or more.
 
Um that doesn't add up to 100%?? 50% + 80% + 90% = ???
Sorry maybe having a blonde moment here but just trying to understand it lol.
 
@jungman Bayesian statistics

100% of 1% of group like vanilla, 100% of 99% like chocolate


horrible example sorry >< I suck at math. I dont get how he gets 66 people though because it adds up to 71 people ><

10 have been 50% my PT income
25 have been 80%
36 have been 90%
I could never have dealt with 30 of them and only lost 10% income.
 
I was obviously unclear.

Of the 66 people, the TOP 10 add up to 50% of everything I've earned from PT.
Of the 66 people, the TOP 25 add up to 80% of it.
And so on. The top 25 includes the top 10, etc. eg Anna pays for 50% of the meal, Anna and Bob together have paid for 80% of the meal.
 
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