frustrated with proportions math
I feel like the answer is right in my face. I know this is a proportion question. But why is my answer coming out either, 20, or 2000?
How many units of heparin are in 50mL of a 100,000 units/L solution?
A. 50 units
B. 500 units
C. 5,000 units
D. 50,000 units
I feel so stupid because this is so easy.