-30.25% is the change from 238 to 166
Calculation steps:
[( 166 - 238 ) ÷ 238] x 100 = -30.25%
Formula
Percentage change = [(166 - 238) / 238] x 100
Subtract the new number by the original number
166 - 238 = -72
-72 ÷ 238 = -0.3025210084033613
-0.3025210084033613 x 100 = -30.25%