-50.79% is the change from 632 to 311
Calculation steps:
[( 311 - 632 ) ÷ 632] x 100 = -50.79%
Formula
Percentage change = [(311 - 632) / 632] x 100
Subtract the new number by the original number
311 - 632 = -321
-321 ÷ 632 = -0.5079113924050633
-0.5079113924050633 x 100 = -50.79%