-89.13% is the change from 920 to 100
Calculation steps:
[( 100 - 920 ) ÷ 920] x 100 = -89.13%
Formula
Percentage change = [(100 - 920) / 920] x 100
Subtract the new number by the original number
100 - 920 = -820
-820 ÷ 920 = -0.8913043478260869
-0.8913043478260869 x 100 = -89.13%