-38.83% is the change from 309 to 189
Calculation steps:
[( 189 - 309 ) ÷ 309] x 100 = -38.83%
Formula
Percentage change = [(189 - 309) / 309] x 100
Subtract the new number by the original number
189 - 309 = -120
-120 ÷ 309 = -0.3883495145631068
-0.3883495145631068 x 100 = -38.83%