Apply the process for finding percent change to a real-world scenario. Problem: In 2011, the IRS increased the deductible mileage cost to $55.5$ cents from $51$ cents. Find the percent change, rounded to the nearest tenth of a percent. 1. Find the amount of change: Subtract the original amount from the new amount: $55.5 - 51 = 4.5$. 2. Find the percent: The amount of change is what percent of the original amount? Let $p$ = the percent. Translate "$4.5$ is what percent of $51$?" into the equation: $4.5 = p \times 51$. 3. Solve: Divide both sides by $51$ to get $p \approx 0.0882$. 4. Convert to percent form and round to the nearest tenth: $p \approx 8.8\%$. The percent change is an $8.8\%$ increase.