-82.3% is the change from 938 to 166
Calculation steps:
[( 166 - 938 ) ÷ 938] x 100 = -82.3%
Formula
Percentage change = [(166 - 938) / 938] x 100
Subtract the new number by the original number
166 - 938 = -772
-772 ÷ 938 = -0.8230277185501066
-0.8230277185501066 x 100 = -82.3%