-49.05% is the change from 687 to 350
Calculation steps:
[( 350 - 687 ) ÷ 687] x 100 = -49.05%
Formula
Percentage change = [(350 - 687) / 687] x 100
Subtract the new number by the original number
350 - 687 = -337
-337 ÷ 687 = -0.49053857350800584
-0.49053857350800584 x 100 = -49.05%