-49.51% is the change from 305 to 154
Calculation steps:
[( 154 - 305 ) ÷ 305] x 100 = -49.51%
Formula
Percentage change = [(154 - 305) / 305] x 100
Subtract the new number by the original number
154 - 305 = -151
-151 ÷ 305 = -0.49508196721311476
-0.49508196721311476 x 100 = -49.51%