-92.64% is the change from 693 to 51
Calculation steps:
[( 51 - 693 ) ÷ 693] x 100 = -92.64%
Formula
Percentage change = [(51 - 693) / 693] x 100
Subtract the new number by the original number
51 - 693 = -642
-642 ÷ 693 = -0.9264069264069265
-0.9264069264069265 x 100 = -92.64%