-92.51% is the change from 681 to 51
Calculation steps:
[( 51 - 681 ) ÷ 681] x 100 = -92.51%
Formula
Percentage change = [(51 - 681) / 681] x 100
Subtract the new number by the original number
51 - 681 = -630
-630 ÷ 681 = -0.9251101321585903
-0.9251101321585903 x 100 = -92.51%