-83.2% is the change from 988 to 166
Calculation steps:
[( 166 - 988 ) ÷ 988] x 100 = -83.2%
Formula
Percentage change = [(166 - 988) / 988] x 100
Subtract the new number by the original number
166 - 988 = -822
-822 ÷ 988 = -0.8319838056680162
-0.8319838056680162 x 100 = -83.2%