The negative antigen frequencies are used in the formula below to determine the percent of...

The negative antigen frequencies are used in the formula below to determine the percent of type-specific units that would be compatible for the patient. Negative antigen frequencies are determined by subtracting the percent antigen frequency from 100%. The negative antigen frequency for K in this case is .91 (1.00 - .09) and the negative antigen frequency for Fya is .34 (1.00 - .66).

% compatible units available = 100 x (Neg frequency #1 x Neg frequency #2...)

For this case, the calculation is:

% compatible units available = 100 x (0.91 x 0.34) = 30.94 or 31%

If the antigen frequencies for K = 0.09 and Fya = 0.66, what percent of type-specific units would be compatible for a patient with anti-K and anti-Fya?