-50.81% is the change from 307 to 151
Calculation steps:
[( 151 - 307 ) ÷ 307] x 100 = -50.81%
Formula
Percentage change = [(151 - 307) / 307] x 100
Subtract the new number by the original number
151 - 307 = -156
-156 ÷ 307 = -0.50814332247557
-0.50814332247557 x 100 = -50.81%