-82.74% is the change from 921 to 159
Calculation steps:
[( 159 - 921 ) ÷ 921] x 100 = -82.74%
Formula
Percentage change = [(159 - 921) / 921] x 100
Subtract the new number by the original number
159 - 921 = -762
-762 ÷ 921 = -0.8273615635179153
-0.8273615635179153 x 100 = -82.74%