The correct option is A - 50%
Step-by-step explanation:
Given data:
Number of pretzels baked = 800
Time taken = 8 hours
New production = 1200 pretzels
Thus, in order to calculate the productivity the following will be used:
In 8 hours, number of pretzels baked = 800
SO hourly production = 100
If production is increased to 1200,
hourly production = 1200/8 = 150
So, change in productivity =

= 50%