9514 1404 393
Answer:
an increase of 26.44%
Explanation:
The 9% increase multiplies the value by 1 +9% = 1.09.
The 16% increase multiplies the value by 1 +16% = 1.16.
Either followed by the other will multiply the value by ...
1.09 · 1.16 = 1.2644 = 1 + 26.44%
The effect of both increases is an increase in the original value of 26.44%.