Tough and Tricky questions: Percents.
Over the course of a year, a certain microbrewery increased its beer output by 90 percent. At the same time, it decreased its total working hours by 5 percent. By what percent did this factory increase its output per hour?
Select the correct option
A) 200 B) 100 C) 300 D) 400 E) 500
Lets assume the initial production was 100 litres of beer for 100 hr.   With the 90% increase the total amount of beer production will be 190 litres and with 5 % decrease in total hours will be reduced to 95 hr.   100hr ----&gt; 100 lts   1hr -----&gt; 1 lts   95hr -----&gt; 190 lts   1hr -----&gt; 2 lts   Total Increase in production for 1 hr = 200%   200nswer 200
<result>A</result>
Tough and Tricky questions: Percents.
Over the course of a year, a certain microbrewery increased its beer output by 90 percent. At the same time, it decreased its total working hours by 5 percent. By what percent did this factory increase its output per hour?