-66.83% is the change from 621 to 206
Calculation steps:
[( 206 - 621 ) ÷ 621] x 100 = -66.83%
Formula
Percentage change = [(206 - 621) / 621] x 100
Subtract the new number by the original number
206 - 621 = -415
-415 ÷ 621 = -0.6682769726247987
-0.6682769726247987 x 100 = -66.83%