I divided 1.37 by 1.09 and am not getting the answer which is 12.01%. I know i have a math error can you please write out the steps how they got this

[1+z3]3= [1+z2]? [1 +f12) (1 + 0.11)3= (1 + 0.09)1 [1 + $1,2); $1,2 = 12.01%