-21.18% is the change from 680 to 536
Calculation steps:
[( 536 - 680 ) ÷ 680] x 100 = -21.18%
Formula
Percentage change = [(536 - 680) / 680] x 100
Subtract the new number by the original number
536 - 680 = -144
-144 ÷ 680 = -0.21176470588235294
-0.21176470588235294 x 100 = -21.18%