-69.26% is the change from 680 to 209
Calculation steps:
[( 209 - 680 ) ÷ 680] x 100 = -69.26%
Formula
Percentage change = [(209 - 680) / 680] x 100
Subtract the new number by the original number
209 - 680 = -471
-471 ÷ 680 = -0.6926470588235294
-0.6926470588235294 x 100 = -69.26%