-71.56% is the change from 450 to 128
Calculation steps:
[( 128 - 450 ) ÷ 450] x 100 = -71.56%
Formula
Percentage change = [(128 - 450) / 450] x 100
Subtract the new number by the original number
128 - 450 = -322
-322 ÷ 450 = -0.7155555555555555
-0.7155555555555555 x 100 = -71.56%