-82.95% is the change from 921 to 157
Calculation steps:
[( 157 - 921 ) ÷ 921] x 100 = -82.95%
Formula
Percentage change = [(157 - 921) / 921] x 100
Subtract the new number by the original number
157 - 921 = -764
-764 ÷ 921 = -0.8295331161780674
-0.8295331161780674 x 100 = -82.95%