-88.17% is the change from 921 to 109
Calculation steps:
[( 109 - 921 ) ÷ 921] x 100 = -88.17%
Formula
Percentage change = [(109 - 921) / 921] x 100
Subtract the new number by the original number
109 - 921 = -812
-812 ÷ 921 = -0.8816503800217155
-0.8816503800217155 x 100 = -88.17%