-92.24% is the change from 657 to 51
Calculation steps:
[( 51 - 657 ) ÷ 657] x 100 = -92.24%
Formula
Percentage change = [(51 - 657) / 657] x 100
Subtract the new number by the original number
51 - 657 = -606
-606 ÷ 657 = -0.9223744292237442
-0.9223744292237442 x 100 = -92.24%