Posted by mae on .
a bathroom cleaner contains 1 part of bleach with 4 parts of water. if you need 10 parts of bathroom cleaner, how much water and bleach do you need?
If 1 part bleach and 4 parts water = 5 parts, then what do you need to do to get 10 parts? Although this does not solve the problem for you, I hope it leads you to the solution.
Thanks for asking.

math 
Sam,
Lol hmmm well the ratio is 1:4 which is 5 parts. To get 10 u just multiply the ratio by two. Or since the ratio is 1:4 u know that bleach is 20 % of ur solution