-64.06% is the change from 128 to 46
Calculation steps:
[( 46 - 128 ) ÷ 128] x 100 = -64.06%
Formula
Percentage change = [(46 - 128) / 128] x 100
Subtract the new number by the original number
46 - 128 = -82
-82 ÷ 128 = -0.640625
-0.640625 x 100 = -64.06%