-49.2% is the change from 687 to 349
Calculation steps:
[( 349 - 687 ) ÷ 687] x 100 = -49.2%
Formula
Percentage change = [(349 - 687) / 687] x 100
Subtract the new number by the original number
349 - 687 = -338
-338 ÷ 687 = -0.49199417758369723
-0.49199417758369723 x 100 = -49.2%