-27.21% is the change from 680 to 495
Calculation steps:
[( 495 - 680 ) ÷ 680] x 100 = -27.21%
Formula
Percentage change = [(495 - 680) / 680] x 100
Subtract the new number by the original number
495 - 680 = -185
-185 ÷ 680 = -0.27205882352941174
-0.27205882352941174 x 100 = -27.21%