220 - 30 = 190 - 62 = 128 128 x.60 = 76.8 +62 = 138.8 = 139
128 x .85 = 108.8 +62 = 170.8 = 171
Using the above formula, which number is the Target Heart rate at 90%?

Sorry about the calculator and me asap me asap because for real like some no one answers question one for me so that's why i'm posting them over to that way someone can at least answer number two or one for me if you do you so much if you do it would be a complete big blessing to me