-50.49% is the change from 305 to 151
Calculation steps:
[( 151 - 305 ) ÷ 305] x 100 = -50.49%
Formula
Percentage change = [(151 - 305) / 305] x 100
Subtract the new number by the original number
151 - 305 = -154
-154 ÷ 305 = -0.5049180327868853
-0.5049180327868853 x 100 = -50.49%