-69.12% is the change from 680 to 210
Calculation steps:
[( 210 - 680 ) ÷ 680] x 100 = -69.12%
Formula
Percentage change = [(210 - 680) / 680] x 100
Subtract the new number by the original number
210 - 680 = -470
-470 ÷ 680 = -0.6911764705882353
-0.6911764705882353 x 100 = -69.12%