-89.01% is the change from 910 to 100
Calculation steps:
[( 100 - 910 ) ÷ 910] x 100 = -89.01%
Formula
Percentage change = [(100 - 910) / 910] x 100
Subtract the new number by the original number
100 - 910 = -810
-810 ÷ 910 = -0.8901098901098901
-0.8901098901098901 x 100 = -89.01%