Answer:
24.
=
and the answer is 16 people
25. 80 people
26. Type AB
Explanation:
24. Putting 145 donors over 100% is equal to B over 11% because you are trying to find how many donors have type B blood out of 145. 100% is all the people who donated blood and 11% is how many people had type B blood.
=
You can solve this as well by cross-multiplying.
Then, you get:
319=20x and divide by 20 on each side. (I simplified 145/100 to 29/20)
x=15.95 then you round to 16.
25. Add up the percentage of people who do not have type O blood.
40%+11%+4%=55%. Multiply 145x55%=79.75 (round up) about 80 people.
26. You can use common sense here. The smallest percentage definitely has less than 10 donors. But to prove it just multiply 145x4%=5.8 (rounds to 6). 10>6 so Type AB