A local manufacturer builds lawn mowers for sale nationally. This year the company has put a new production process in place. Production has increased from 60 lawnmowers per day last year to 90 lawnmowers per day this year. The number of defective lawnmowers produced has dropped from 10 per day last year to 1 per day this year.
a) What was number of quality lawn mowers per day?
b) What was the number of quality lawn mowers per year?
c) What was the rate of productivity improvement?