-58.7% is the change from 506 to 209
Calculation steps:
[( 209 - 506 ) ÷ 506] x 100 = -58.7%
Formula
Percentage change = [(209 - 506) / 506] x 100
Subtract the new number by the original number
209 - 506 = -297
-297 ÷ 506 = -0.5869565217391305
-0.5869565217391305 x 100 = -58.7%