-73.44% is the change from 512 to 136
Calculation steps:
[( 136 - 512 ) ÷ 512] x 100 = -73.44%
Formula
Percentage change = [(136 - 512) / 512] x 100
Subtract the new number by the original number
136 - 512 = -376
-376 ÷ 512 = -0.734375
-0.734375 x 100 = -73.44%