need help with parts a, b and c, please.

Lori Cook produces Final Exam Care Packages for resale by her sorority. She is currently working a total of 8 hours per day to produce 160 care packages. a) Lori's productivity = 12.50 packages/hour (round your response to two decimal places). Lori thinks that by redesigning the package she can increase her total productivity to 140 care packages per day. b) Lori's new productivity = 17.50 packages/hour (round your response to two decimal places) C) If Lori redesigns the package, the productivity increases by % (enter your response as a percentage rounded to two decimal places)