-89.26% is the change from 512 to 55
Calculation steps:
[( 55 - 512 ) ÷ 512] x 100 = -89.26%
Formula
Percentage change = [(55 - 512) / 512] x 100
Subtract the new number by the original number
55 - 512 = -457
-457 ÷ 512 = -0.892578125
-0.892578125 x 100 = -89.26%