-21.2% is the change from 849 to 669
Calculation steps:
[( 669 - 849 ) ÷ 849] x 100 = -21.2%
Formula
Percentage change = [(669 - 849) / 849] x 100
Subtract the new number by the original number
669 - 849 = -180
-180 ÷ 849 = -0.21201413427561838
-0.21201413427561838 x 100 = -21.2%