i have a couple things i wanted to clear up

i have a garrett T-28 turbo
specs
compressor- AR- .48
trim- 54.80

turbine- AR- .49
trim- QUESTION

i read the garret turbo info 101 102 and 103 which were bad *** write ups but the trim part confused me. i says that i am suposed to divide inducer^2 by exducer^2 then times that answer by 100 and i have my trim. well when you do that for the turbine side i get a trim of 147.62 which dosnt quite seem right. but when i do exducer by inducer i get 68.79. but the inducer switches from compressor to turbine cause one is being blown and the other is blowing there for on the turbine side the big part of the wheel is the inducer. and when you divide a bigger number by a smaller number you get a larger amount. so is 147 right or am i doing something wrong. i hope i didnt confuse yall
if it helps the turbine wheel inducer is 46.45mm and the exducer is 38.53mm

thanks in advance for all the help