-63.28% is the change from 128 to 47
Calculation steps:
[( 47 - 128 ) ÷ 128] x 100 = -63.28%
Formula
Percentage change = [(47 - 128) / 128] x 100
Subtract the new number by the original number
47 - 128 = -81
-81 ÷ 128 = -0.6328125
-0.6328125 x 100 = -63.28%