-25.74% is the change from 680 to 505
Calculation steps:
[( 505 - 680 ) ÷ 680] x 100 = -25.74%
Formula
Percentage change = [(505 - 680) / 680] x 100
Subtract the new number by the original number
505 - 680 = -175
-175 ÷ 680 = -0.25735294117647056
-0.25735294117647056 x 100 = -25.74%