-63.5% is the change from 685 to 250
Calculation steps:
[( 250 - 685 ) ÷ 685] x 100 = -63.5%
Formula
Percentage change = [(250 - 685) / 685] x 100
Subtract the new number by the original number
250 - 685 = -435
-435 ÷ 685 = -0.635036496350365
-0.635036496350365 x 100 = -63.5%