To calculate the percent change in the price of the coffee, we can use the following formula:
In this case, the old value is 2 dollars, and the new value is 2 + 1 = 3 dollars. Plugging these values into the formula, we get:
Simplifying this expression, we get:
This simplifies to:
Which is equal to:
Therefore, the percent change in the price of the coffee is 50%. This means that the price increased by 50% when it was increased by 1 dollar.
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