-50.29% is the change from 686 to 341
Calculation steps:
[( 341 - 686 ) ÷ 686] x 100 = -50.29%
Formula
Percentage change = [(341 - 686) / 686] x 100
Subtract the new number by the original number
341 - 686 = -345
-345 ÷ 686 = -0.5029154518950437
-0.5029154518950437 x 100 = -50.29%