-69.53% is the change from 512 to 156
Calculation steps:
[( 156 - 512 ) ÷ 512] x 100 = -69.53%
Formula
Percentage change = [(156 - 512) / 512] x 100
Subtract the new number by the original number
156 - 512 = -356
-356 ÷ 512 = -0.6953125
-0.6953125 x 100 = -69.53%