-59.81% is the change from 520 to 209
Calculation steps:
[( 209 - 520 ) ÷ 520] x 100 = -59.81%
Formula
Percentage change = [(209 - 520) / 520] x 100
Subtract the new number by the original number
209 - 520 = -311
-311 ÷ 520 = -0.5980769230769231
-0.5980769230769231 x 100 = -59.81%