-81.76% is the change from 921 to 168
Calculation steps:
[( 168 - 921 ) ÷ 921] x 100 = -81.76%
Formula
Percentage change = [(168 - 921) / 921] x 100
Subtract the new number by the original number
168 - 921 = -753
-753 ÷ 921 = -0.8175895765472313
-0.8175895765472313 x 100 = -81.76%