-49.64% is the change from 687 to 346
Calculation steps:
[( 346 - 687 ) ÷ 687] x 100 = -49.64%
Formula
Percentage change = [(346 - 687) / 687] x 100
Subtract the new number by the original number
346 - 687 = -341
-341 ÷ 687 = -0.4963609898107715
-0.4963609898107715 x 100 = -49.64%