-50.44% is the change from 680 to 337
Calculation steps:
[( 337 - 680 ) ÷ 680] x 100 = -50.44%
Formula
Percentage change = [(337 - 680) / 680] x 100
Subtract the new number by the original number
337 - 680 = -343
-343 ÷ 680 = -0.5044117647058823
-0.5044117647058823 x 100 = -50.44%