-98.7% is the change from 849 to 11
Calculation steps:
[( 11 - 849 ) ÷ 849] x 100 = -98.7%
Formula
Percentage change = [(11 - 849) / 849] x 100
Subtract the new number by the original number
11 - 849 = -838
-838 ÷ 849 = -0.9870435806831567
-0.9870435806831567 x 100 = -98.7%