-95.62% is the change from 685 to 30
Calculation steps:
[( 30 - 685 ) ÷ 685] x 100 = -95.62%
Formula
Percentage change = [(30 - 685) / 685] x 100
Subtract the new number by the original number
30 - 685 = -655
-655 ÷ 685 = -0.9562043795620438
-0.9562043795620438 x 100 = -95.62%