-50.95% is the change from 687 to 337
Calculation steps:
[( 337 - 687 ) ÷ 687] x 100 = -50.95%
Formula
Percentage change = [(337 - 687) / 687] x 100
Subtract the new number by the original number
337 - 687 = -350
-350 ÷ 687 = -0.5094614264919942
-0.5094614264919942 x 100 = -50.95%