How many liters of brown paint did he use?

Mathematics
Tutor: None Selected Time limit: 1 Day

Leon used 2.1 liters of green paint to paint 42% of his room. He painted the remaining part of his room using brown paint. How many liters of brown paint did he use?

Apr 26th, 2015

100% - 42%=58% 
2.1 - 42% 
x - 58% 
so: 
2.1/42 * 58=2.9 

He used 2.9L of brown paint

Apr 26th, 2015

What did you do after 2.1 - 42%?

Apr 26th, 2015

x - liters of brown paint, 

100% - the whole room, 

of green paint to paint 42% of his room, so of brown paint 100%-42%=58%. 

make up a proportion: 

2.1/42%=x/58%, 

so x=(2.1/42%)*58%=2.9L

Apr 27th, 2015

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