Question 1085180
here's my worksheet.


<img src = "http://theo.x10hosting.com/2017/061904.jpg" alt="$$$" </>


top of the tree is mattress.


this gets split into 30% firm and 70% soft


firm gets split into 20% serta 30 klein 50% sleep number


soft gets split into 25% serta 35% klein 40% sleep number.


the ratio, or proportion in each branch is the ratio in each step of the branch multiplied by each other.


for example, ratio of serta in the firm branch is .3 * .2 = .06 and ratio of serta in the soft branch is .7 * .25= .175


the total ratio, or proportion, of serta is .06 + .175 = .235


likewise, the ratio, or proportion, of klein is .09 + .245 = .335


this means that 33.5% of the people selected a klein.


percent = (ratio or proportion) * 100


(ratio or proportion) = percent / 100


.335 ratio = 33.5%