-31.91% is the change from 188 to 128
Calculation steps:
[( 128 - 188 ) ÷ 188] x 100 = -31.91%
Formula
Percentage change = [(128 - 188) / 188] x 100
Subtract the new number by the original number
128 - 188 = -60
-60 ÷ 188 = -0.3191489361702128
-0.3191489361702128 x 100 = -31.91%