Answer
The percentage change in the patient’s daily dosage is +20%, so this is a percent increase.
Work Step by Step
To find the percentage change, we use the following formula:
Percent of change = $\frac{New\ amount\ -\ Original\ amount}{Original\ amount}$ $\times$ 100%
The original amount is 500, and the new amount is 600. We substitute these values into the formula to obtain :
percentage change = $\frac{600\ -\ 500}{500}$ $\times$ 100%
percentage change = $\frac{100}{500}$ $\times$ 100%
percentage change = 0.2 $\times$ 100%
percentage change = 20%