-91.89% is the change from 629 to 51
Calculation steps:
[( 51 - 629 ) ÷ 629] x 100 = -91.89%
Formula
Percentage change = [(51 - 629) / 629] x 100
Subtract the new number by the original number
51 - 629 = -578
-578 ÷ 629 = -0.918918918918919
-0.918918918918919 x 100 = -91.89%