-10.05% is the change from 209 to 188
Calculation steps:
[( 188 - 209 ) ÷ 209] x 100 = -10.05%
Formula
Percentage change = [(188 - 209) / 209] x 100
Subtract the new number by the original number
188 - 209 = -21
-21 ÷ 209 = -0.10047846889952153
-0.10047846889952153 x 100 = -10.05%