-5.32% is the change from 188 to 178
Calculation steps:
[( 178 - 188 ) ÷ 188] x 100 = -5.32%
Formula
Percentage change = [(178 - 188) / 188] x 100
Subtract the new number by the original number
178 - 188 = -10
-10 ÷ 188 = -0.05319148936170213
-0.05319148936170213 x 100 = -5.32%