-80.67% is the change from 921 to 178
Calculation steps:
[( 178 - 921 ) ÷ 921] x 100 = -80.67%
Formula
Percentage change = [(178 - 921) / 921] x 100
Subtract the new number by the original number
178 - 921 = -743
-743 ÷ 921 = -0.8067318132464713
-0.8067318132464713 x 100 = -80.67%