Final answer:
The percentage increase in the value of Tessa's stock is calculated by subtracting the original value from the current value to find the increase, then dividing the increase by the original value, and finally multiplying by 100%. Tessa's stock increased by 33%.
Step-by-step explanation:
To calculate the percentage increase of the value of Tessa's stock, we will use the following formula:
Percentage Increase = (Increase in Value / Original Value) x 100%
First, we determine the increase in value:
Increased Value = Current Value - Original Value
Increased Value = $383.04 - $288.00 = $95.04
Next, we calculate the percentage increase:
Percentage Increase = ($95.04 / $288.00) x 100% = 0.3300 x 100% = 33%
Therefore, the percentage increase in the value of Tessa's stock is 33%.