-68.76% is the change from 669 to 209
Calculation steps:
[( 209 - 669 ) ÷ 669] x 100 = -68.76%
Formula
Percentage change = [(209 - 669) / 669] x 100
Subtract the new number by the original number
209 - 669 = -460
-460 ÷ 669 = -0.6875934230194319
-0.6875934230194319 x 100 = -68.76%