-9.57% is the change from 209 to 189
Calculation steps:
[( 189 - 209 ) ÷ 209] x 100 = -9.57%
Formula
Percentage change = [(189 - 209) / 209] x 100
Subtract the new number by the original number
189 - 209 = -20
-20 ÷ 209 = -0.09569377990430622
-0.09569377990430622 x 100 = -9.57%