Answer:
139 donors
Explanation:
So we have 37:43 as ratio. Lets add 37 and 43, giving us 80. So let's make the proportion, 37/80 = d/300. (d since d it stands for donors). Now let's cross multiply. 80d = 11100
d=11100/80
d=138.75
u dont just have part of a person, as that is manslaughter, you round to 139