-49.61% is the change from 633 to 319
Calculation steps:
[( 319 - 633 ) ÷ 633] x 100 = -49.61%
Formula
Percentage change = [(319 - 633) / 633] x 100
Subtract the new number by the original number
319 - 633 = -314
-314 ÷ 633 = -0.4960505529225908
-0.4960505529225908 x 100 = -49.61%