-50.24% is the change from 633 to 315
Calculation steps:
[( 315 - 633 ) ÷ 633] x 100 = -50.24%
Formula
Percentage change = [(315 - 633) / 633] x 100
Subtract the new number by the original number
315 - 633 = -318
-318 ÷ 633 = -0.5023696682464455
-0.5023696682464455 x 100 = -50.24%