-74.8% is the change from 512 to 129
Calculation steps:
[( 129 - 512 ) ÷ 512] x 100 = -74.8%
Formula
Percentage change = [(129 - 512) / 512] x 100
Subtract the new number by the original number
129 - 512 = -383
-383 ÷ 512 = -0.748046875
-0.748046875 x 100 = -74.8%