-30.37% is the change from 270 to 188
Calculation steps:
[( 188 - 270 ) ÷ 270] x 100 = -30.37%
Formula
Percentage change = [(188 - 270) / 270] x 100
Subtract the new number by the original number
188 - 270 = -82
-82 ÷ 270 = -0.3037037037037037
-0.3037037037037037 x 100 = -30.37%