A person's blood type is denoted with the letters A, B, and O, and the symbols + and . The blood type A+ is read as A positive. The blood type B is read as B negative. Use the data to write a ratio for the comparison in 3 different ways.
+ donors to + donors

Type | Donors
------------------------
A+ | 47
B+ | 25
AB+ | 7
O+ | 95
A- | 27
B- | 0
AB- | 3
O- | 13
------------------
total|217

The ratio using the word "to" is
nothing to
nothing.

Question

A​ person's blood type is denoted with the letters​ A, B, and​ O, and the symbols​ + and . The blood type​ A+ is read as A positive. The blood type B is read as B negative. Use the data to write a ratio for the comparison in 3 different ways.
​+ donors to ​+ donors
     
Type  |    Donors
------------------------
A+      |  47
B+      |  25 
AB+    |  7
O+      |  95
A-        |  27
B-        |   0
AB-      |   3
O-        |   13
------------------
total|217

The ratio using the word​ "to" is 
nothing to 
nothing.

PWRDrEaMz · Answer

Maybe try to divide the total to the number of type's?