Answer:
(a) O+ to A+



(b) AB- : AB+



(c): B+ to total



Step-by-step explanation:
Given



See attachment
Required
Solving (a): O+ to A+
We have:


So, the ratio is:
---- first comparison
Divide by 5

---- Second comparison
Divide by 45

---- Third comparison
Solving (b): AB- to AB+
We have:

So, the ratio is:
---- first comparison
Divide by 2

---- Second comparison
Multiply by 2

---- Third comparison
Solving (c): B+ to total
We have:


So, the ratio is:
---- first comparison
Divide by 5

---- Second comparison
Multiply by 2

---- Third comparison
Answer:
10/18 and 20/36
Step-by-step explanation:
The best way to do this is to make up values for the sides.
Say the lengths of square B's sides are each 4 cm. That means A's sides are 2 cm.
So, the area of square B is 4^2 = 16 cm^2, and A's area is 4 cm^2. We can see the shaded area is half of A, so it's 2 cm^2.
What percent of 16 is 2?
2 / 16 * 100 = 12.5%