Question

In the morning,a farm worker packed 3 pints of strawberries every 4 minutes.In the after afternoon,she packed 2 pints of strawberries every 3 minutes.What was the difference between her morning and afternoon packing rates in pints per hour?

Answer 1

(3 pt)/(4/60 h) -(2 pt)/(3/60 h) = (180/4 pt/h) -(120/3 pt/h)
  = 45 pt/h -40 pt/h
  = 5 pt/h