Final answer:
The single percentage change equivalent to a 17% increase followed by an 8% decrease is 9%.
Step-by-step explanation:
To find the single percentage change that is equivalent to a 17% increase followed by an 8% decrease, we can use the formula for compound percentage changes. First, let's calculate the overall change as a decimal. For the increase of 17%, we add 1 to 17% (1 + 0.17 = 1.17). Next, for the decrease of 8%, we subtract 8% from 1.17 (1.17 - 0.08 = 1.09). Finally, we convert the decimal back to a percentage by subtracting 1 and multiplying by 100. So, the single percentage change is 9%.