To determine the percentage increase, we compute the difference in the insurance premium in 2011 and 2012. We have
![\$4960.08-\$3150.42=\$1809.66](https://img.qammunity.org/2023/formulas/mathematics/college/tfyu2fr82z7xg7pss73dfbapsbav2rctsp.png)
We then divide this value by the initial insurance premium and multiply it by 100%. We have
![(\$1809.66)/(\$3150.42)*100\%=57\%](https://img.qammunity.org/2023/formulas/mathematics/college/1wicl0z2xpt5l7m0k0scifs5yd01mim5pq.png)
The percentage increase in his insurance is 57%.