-66.18% is the change from 680 to 230
Calculation steps:
[( 230 - 680 ) ÷ 680] x 100 = -66.18%
Formula
Percentage change = [(230 - 680) / 680] x 100
Subtract the new number by the original number
230 - 680 = -450
-450 ÷ 680 = -0.6617647058823529
-0.6617647058823529 x 100 = -66.18%