Human buying irrationality

I longer watch processors for Socket A on the secondhand market, Athlon XP 1.86 GHz with a PR rating of 2500+ costs $7, and Athlon XP 2.16Ghz with a PR rating of 3000+ currently costs $16.



Calculate:

1. About what percentage of the Athlon XP 2.16Ghz is more powerful than Athlon XP 1.86 GHz


2. About what percentage of the Athlon XP 2.16Ghz is more expensive than Athlon XP 1.86 GHz


3. About what percentage of the Athlon XP 2.16Ghz is more powerful than Athlon XP 1.86 GHz - based on marketing PR rating

Final Answer:

a =  16.1 %
b =  128.6 %
c =  20 %

Step-by-step explanation:

$a=\frac{2.16-1.86}{1.86}\cdot 100=16.1\%$

$b=\frac{16-7}{7}\cdot 100=128.6\%$

$c=\frac{3000-2500}{2500}\cdot 100=20\%$

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