-89.84% is the change from 669 to 68
Calculation steps:
[( 68 - 669 ) ÷ 669] x 100 = -89.84%
Formula
Percentage change = [(68 - 669) / 669] x 100
Subtract the new number by the original number
68 - 669 = -601
-601 ÷ 669 = -0.898355754857997
-0.898355754857997 x 100 = -89.84%