-84.58% is the change from 921 to 142
Calculation steps:
[( 142 - 921 ) ÷ 921] x 100 = -84.58%
Formula
Percentage change = [(142 - 921) / 921] x 100
Subtract the new number by the original number
142 - 921 = -779
-779 ÷ 921 = -0.8458197611292074
-0.8458197611292074 x 100 = -84.58%