-50.71% is the change from 633 to 312
Calculation steps:
[( 312 - 633 ) ÷ 633] x 100 = -50.71%
Formula
Percentage change = [(312 - 633) / 633] x 100
Subtract the new number by the original number
312 - 633 = -321
-321 ÷ 633 = -0.5071090047393365
-0.5071090047393365 x 100 = -50.71%