-63.24% is the change from 680 to 250
Calculation steps:
[( 250 - 680 ) ÷ 680] x 100 = -63.24%
Formula
Percentage change = [(250 - 680) / 680] x 100
Subtract the new number by the original number
250 - 680 = -430
-430 ÷ 680 = -0.6323529411764706
-0.6323529411764706 x 100 = -63.24%