-39.09% is the change from 307 to 187
Calculation steps:
[( 187 - 307 ) ÷ 307] x 100 = -39.09%
Formula
Percentage change = [(187 - 307) / 307] x 100
Subtract the new number by the original number
187 - 307 = -120
-120 ÷ 307 = -0.39087947882736157
-0.39087947882736157 x 100 = -39.09%