-50.8% is the change from 685 to 337
Calculation steps:
[( 337 - 685 ) ÷ 685] x 100 = -50.8%
Formula
Percentage change = [(337 - 685) / 685] x 100
Subtract the new number by the original number
337 - 685 = -348
-348 ÷ 685 = -0.5080291970802919
-0.5080291970802919 x 100 = -50.8%