-69.21% is the change from 669 to 206
Calculation steps:
[( 206 - 669 ) ÷ 669] x 100 = -69.21%
Formula
Percentage change = [(206 - 669) / 669] x 100
Subtract the new number by the original number
206 - 669 = -463
-463 ÷ 669 = -0.6920777279521674
-0.6920777279521674 x 100 = -69.21%