-12.96% is the change from 216 to 188
Calculation steps:
[( 188 - 216 ) ÷ 216] x 100 = -12.96%
Formula
Percentage change = [(188 - 216) / 216] x 100
Subtract the new number by the original number
188 - 216 = -28
-28 ÷ 216 = -0.12962962962962962
-0.12962962962962962 x 100 = -12.96%