-92.68% is the change from 697 to 51
Calculation steps:
[( 51 - 697 ) ÷ 697] x 100 = -92.68%
Formula
Percentage change = [(51 - 697) / 697] x 100
Subtract the new number by the original number
51 - 697 = -646
-646 ÷ 697 = -0.926829268292683
-0.926829268292683 x 100 = -92.68%