-21.32% is the change from 680 to 535
Calculation steps:
[( 535 - 680 ) ÷ 680] x 100 = -21.32%
Formula
Percentage change = [(535 - 680) / 680] x 100
Subtract the new number by the original number
535 - 680 = -145
-145 ÷ 680 = -0.21323529411764705
-0.21323529411764705 x 100 = -21.32%