-49.7% is the change from 672 to 338
Calculation steps:
[( 338 - 672 ) ÷ 672] x 100 = -49.7%
Formula
Percentage change = [(338 - 672) / 672] x 100
Subtract the new number by the original number
338 - 672 = -334
-334 ÷ 672 = -0.49702380952380953
-0.49702380952380953 x 100 = -49.7%