A patient was given 40mg of a certain medicine. later, the patient's dosage was increased to 45mg. what was the percentage increase in his medication?

The original dosage was 40mg and the increased dosage is 45mg. To calculate the percentage increase, we can use the following formula:

Percentage increase = [(New value - Old value) / Old value] * 100

Plugging in the values we have:

Percentage increase = [(45 - 40) / 40] * 100

Simplifying the equation:

Percentage increase = (5 / 40) * 100

Calculating the value:

Percentage increase = 12.5

Therefore, the percentage increase in the patient's medication dosage is 12.5%.