Question 154271
These are the original values:
60% of 3.6=2.16------------------this is the antifreeze
40% of 3.6=1.44------------------this is the water


50% of 3.6=1.8-------------------this is how much antifreeze you want
2.16-1.8=.36---------------------subtract that from what you have


.36L should be drained.