-41.61% is the change from 685 to 400
Calculation steps:
[( 400 - 685 ) ÷ 685] x 100 = -41.61%
Formula
Percentage change = [(400 - 685) / 685] x 100
Subtract the new number by the original number
400 - 685 = -285
-285 ÷ 685 = -0.41605839416058393
-0.41605839416058393 x 100 = -41.61%