A retail store had sales of $$45,900$ in April and $$56,200$ in May. The store employs eight full$-$time workers who work a $40-$

hour week. In April, the store also had eight part$-$time workers at $12$ hours per week, and in May the store had nine part$-$timers

at $17$ hours per week $($assume four weeks in each month$).$

Using sales dollars as the measure of output, what is the percentage change in productivity from April to May?

Note: Round your Intermedlete calculations and final answer to $2$ decimal places.