-64.77% is the change from 511 to 180
Calculation steps:
[( 180 - 511 ) ÷ 511] x 100 = -64.77%
Formula
Percentage change = [(180 - 511) / 511] x 100
Subtract the new number by the original number
180 - 511 = -331
-331 ÷ 511 = -0.6477495107632094
-0.6477495107632094 x 100 = -64.77%