-69.74% is the change from 423 to 128
Calculation steps:
[( 128 - 423 ) ÷ 423] x 100 = -69.74%
Formula
Percentage change = [(128 - 423) / 423] x 100
Subtract the new number by the original number
128 - 423 = -295
-295 ÷ 423 = -0.6973995271867612
-0.6973995271867612 x 100 = -69.74%