-58.9% is the change from 511 to 210
Calculation steps:
[( 210 - 511 ) ÷ 511] x 100 = -58.9%
Formula
Percentage change = [(210 - 511) / 511] x 100
Subtract the new number by the original number
210 - 511 = -301
-301 ÷ 511 = -0.589041095890411
-0.589041095890411 x 100 = -58.9%