-74.76% is the change from 511 to 129
Calculation steps:
[( 129 - 511 ) ÷ 511] x 100 = -74.76%
Formula
Percentage change = [(129 - 511) / 511] x 100
Subtract the new number by the original number
129 - 511 = -382
-382 ÷ 511 = -0.7475538160469667
-0.7475538160469667 x 100 = -74.76%