-49.68% is the change from 634 to 319
Calculation steps:
[( 319 - 634 ) ÷ 634] x 100 = -49.68%
Formula
Percentage change = [(319 - 634) / 634] x 100
Subtract the new number by the original number
319 - 634 = -315
-315 ÷ 634 = -0.4968454258675079
-0.4968454258675079 x 100 = -49.68%