-77.11% is the change from 166 to 38
Calculation steps:
[( 38 - 166 ) ÷ 166] x 100 = -77.11%
Formula
Percentage change = [(38 - 166) / 166] x 100
Subtract the new number by the original number
38 - 166 = -128
-128 ÷ 166 = -0.7710843373493976
-0.7710843373493976 x 100 = -77.11%