-49.56% is the change from 686 to 346
Calculation steps:
[( 346 - 686 ) ÷ 686] x 100 = -49.56%
Formula
Percentage change = [(346 - 686) / 686] x 100
Subtract the new number by the original number
346 - 686 = -340
-340 ÷ 686 = -0.4956268221574344
-0.4956268221574344 x 100 = -49.56%