-51.24% is the change from 685 to 334
Calculation steps:
[( 334 - 685 ) ÷ 685] x 100 = -51.24%
Formula
Percentage change = [(334 - 685) / 685] x 100
Subtract the new number by the original number
334 - 685 = -351
-351 ÷ 685 = -0.5124087591240876
-0.5124087591240876 x 100 = -51.24%