Answer :

The percent of change in that price of a cell phone from 2000 to today is 86.05%

The given parameters are:

Initial Price = $129

New Price = $240

The percentage change is then calculated as:

[tex]\% Change = \frac{Final - Initial}{Inital} * 100\%[/tex]

So, we have:

[tex]\% Change = \frac{240- 129}{129} * 100\%[/tex]

[tex]\% Change = \frac{111}{129} * 100\%[/tex]

[tex]\% Change = 86.05\%[/tex]

Hence, the percent of change in that price of a cell phone from 2000 to today is 86.05%

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