The following question comes from a practise test...
-------------------------------- One fourth of a solution that was 10 percent sugar by weight was replaced by a second solution resulting in a solution that was 16 percent sugar by weight. The second solution was what percent sugar by weight? --------------------------------
The answer is given to be 34%.
I assumed a 100 part solution so that means it has 10 parts sugar.
1/4 meaning 25 parts was replaced with another solution, so we now have 16 parts sugar.
Thats as far as I can go. Any help would be appreciated.
If you take a quarter of the original solution away you have 7.5 parts out of 75. When combined with the new solution giving 16%, you have added 16-7.5 or 8.5%. Taking this as a percent of the new solution, i.e. 8.5% out of one quarter gives 34% (multiply by 4 to get 100%)
Interactive Math Goodies Software
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Posted - 09/24/2007 : 16:16:17
