Martin Manufacturing has implemented several programs to improve its productivity. They have asked you to evaluate the firm's productivity by comparing this year's performance with last year's. The following data are available.

Last Year This Year

Output $10,500$ units $12,100$ units

Labor $$12,000$ $$13,200$

Utilities $$7,600$ $$8,250$

Capital $$83,000$ $$88,000$

a$.$ What is the percent change in labor productivity this year vs$.$ last year?

$[$ Select $]$