-85.35% is the change from 669 to 98
Calculation steps:
[( 98 - 669 ) ÷ 669] x 100 = -85.35%
Formula
Percentage change = [(98 - 669) / 669] x 100
Subtract the new number by the original number
98 - 669 = -571
-571 ÷ 669 = -0.8535127055306427
-0.8535127055306427 x 100 = -85.35%