-80.78% is the change from 921 to 177
Calculation steps:
[( 177 - 921 ) ÷ 921] x 100 = -80.78%
Formula
Percentage change = [(177 - 921) / 921] x 100
Subtract the new number by the original number
177 - 921 = -744
-744 ÷ 921 = -0.8078175895765473
-0.8078175895765473 x 100 = -80.78%