-89.47% is the change from 921 to 97
Calculation steps:
[( 97 - 921 ) ÷ 921] x 100 = -89.47%
Formula
Percentage change = [(97 - 921) / 921] x 100
Subtract the new number by the original number
97 - 921 = -824
-824 ÷ 921 = -0.8946796959826275
-0.8946796959826275 x 100 = -89.47%