Example is wrong: market shares = 67% and 33% (Score 1)

If for example 2 people are using computers and one replaces his 2x in a 3 year period and the other only does once, market-share dynamics dictate that one demographic has 75% market share while the other has only 25%

I agree with the sentiment but shouldn't that be 67% and 33%? Three computers were sold.