In 1940, the average size of a privately owned farm in a particular country was 185 acres. In a recent year, the average size of a privately owned farm in the country had increased to 454 acres. What is this percent increase?

145.4%

Step-by-step explanation:

Step 1: Write the data

Size of farm in 1940: 185 acres

Size of farm in 1941: 454 acres

Step 2: Calculate the percentage increase

Formula for percentage increase: (New-Previous) / Previous x 100

Percentage increase = (454-185) / 185 x 100

Percentage increase = 145.4%

Therefore, the percentage increase is 145.4%.