A person's blood type is denoted with the letters A, B, and

Last updated: 7/18/2022

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. AB- donors to AB+ donors