-49.22% is the change from 128 to 65
Calculation steps:
[( 65 - 128 ) ÷ 128] x 100 = -49.22%
Formula
Percentage change = [(65 - 128) / 128] x 100
Subtract the new number by the original number
65 - 128 = -63
-63 ÷ 128 = -0.4921875
-0.4921875 x 100 = -49.22%