-90.09% is the change from 938 to 93
Calculation steps:
[( 93 - 938 ) ÷ 938] x 100 = -90.09%
Formula
Percentage change = [(93 - 938) / 938] x 100
Subtract the new number by the original number
93 - 938 = -845
-845 ÷ 938 = -0.9008528784648188
-0.9008528784648188 x 100 = -90.09%