-19.91% is the change from 633 to 507
Calculation steps:
[( 507 - 633 ) ÷ 633] x 100 = -19.91%
Formula
Percentage change = [(507 - 633) / 633] x 100
Subtract the new number by the original number
507 - 633 = -126
-126 ÷ 633 = -0.1990521327014218
-0.1990521327014218 x 100 = -19.91%