-24.03% is the change from 849 to 645
Calculation steps:
[( 645 - 849 ) ÷ 849] x 100 = -24.03%
Formula
Percentage change = [(645 - 849) / 849] x 100
Subtract the new number by the original number
645 - 849 = -204
-204 ÷ 849 = -0.24028268551236748
-0.24028268551236748 x 100 = -24.03%