-65.56% is the change from 450 to 155
Calculation steps:
[( 155 - 450 ) ÷ 450] x 100 = -65.56%
Formula
Percentage change = [(155 - 450) / 450] x 100
Subtract the new number by the original number
155 - 450 = -295
-295 ÷ 450 = -0.6555555555555556
-0.6555555555555556 x 100 = -65.56%