-81.05% is the change from 512 to 97
Calculation steps:
[( 97 - 512 ) ÷ 512] x 100 = -81.05%
Formula
Percentage change = [(97 - 512) / 512] x 100
Subtract the new number by the original number
97 - 512 = -415
-415 ÷ 512 = -0.810546875
-0.810546875 x 100 = -81.05%