To calculate the inflation or deflation rate, you can use the following formula:
\[ \text{Inflation/Deflation Rate} = \frac{\text{Price Level This Year} - \text{Price Level Last Year}}{\text{Price Level Last Year}} \times 100 \]
In this case, the price level last year was 180 and this year it is 176. Plugging in the values:
\[ \text{Rate} = \frac{176 - 180}{180} \times 100 = \frac{-4}{180} \times 100 \approx -2.22% \]
Since the result is negative, this indicates deflation.
Thus, the answer is:
c. there was deflation of 2.2 percent.