-91.94% is the change from 633 to 51
Calculation steps:
[( 51 - 633 ) ÷ 633] x 100 = -91.94%
Formula
Percentage change = [(51 - 633) / 633] x 100
Subtract the new number by the original number
51 - 633 = -582
-582 ÷ 633 = -0.919431279620853
-0.919431279620853 x 100 = -91.94%