-98.2% is the change from 611 to 11
Calculation steps:
[( 11 - 611 ) ÷ 611] x 100 = -98.2%
Formula
Percentage change = [(11 - 611) / 611] x 100
Subtract the new number by the original number
11 - 611 = -600
-600 ÷ 611 = -0.9819967266775778
-0.9819967266775778 x 100 = -98.2%