Tough and Tricky questions: Percents.
Over the course of a year, a certain microbrewery increased its beer output by 60 percent. At the same time, it decreased its total working hours by 30 percent. By what percent did this factory increase its output per hour?  Pick one.
A) 228.5
B) 228
C) 229.5
D) 220
E) 229
Lets assume the initial production was 100 litres of beer for 100 hr.   With the 60% increase the total amount of beer production will be 160 litres and with 30 % decrease in total hours will be reduced to 70 hr.   100hr ----&gt; 100 lts   1hr -----&gt; 1 lts   70hr -----&gt; 160 lts   1hr -----&gt; 2.28 lts   Total Increase in production for 1 hr = 228%   Answer 228
<result>B</result>
Tough and Tricky questions: Percents.
Over the course of a year, a certain microbrewery increased its beer output by 60 percent. At the same time, it decreased its total working hours by 30 percent. By what percent did this factory increase its output per hour?