Problem $2-19($Algo$)$

A parcel delivery company delivered $103,400$ packages last year, when its average employment was $85$ drivers. This year, the firm handled $112,400$ deliveries with $92$ drivers.

What was the percentage change in productivity over the past two years?

Note: Negative value should be indicated by a minus sign. Round your intermediate calculations and final answer to $2$ decimal places.

Change in productivity