Question 417310
percent	----------------	quantity
1	----------------	x
5	----------------	100-x
3.00%	----------------	100		
...

x+5(100-x)=3*100
			
x+500-5x	=300		
x-5x=300	-500		
-4x-=-200							
/-4											
x=50 ml 1%
50ml 3%