-86.94% is the change from 689 to 90
Calculation steps:
[( 90 - 689 ) ÷ 689] x 100 = -86.94%
Formula
Percentage change = [(90 - 689) / 689] x 100
Subtract the new number by the original number
90 - 689 = -599
-599 ÷ 689 = -0.8693759071117562
-0.8693759071117562 x 100 = -86.94%