-49.93% is the change from 685 to 343
Calculation steps:
[( 343 - 685 ) ÷ 685] x 100 = -49.93%
Formula
Percentage change = [(343 - 685) / 685] x 100
Subtract the new number by the original number
343 - 685 = -342
-342 ÷ 685 = -0.4992700729927007
-0.4992700729927007 x 100 = -49.93%