-92.23% is the change from 656 to 51
Calculation steps:
[( 51 - 656 ) ÷ 656] x 100 = -92.23%
Formula
Percentage change = [(51 - 656) / 656] x 100
Subtract the new number by the original number
51 - 656 = -605
-605 ÷ 656 = -0.9222560975609756
-0.9222560975609756 x 100 = -92.23%