-23.79% is the change from 849 to 647
Calculation steps:
[( 647 - 849 ) ÷ 849] x 100 = -23.79%
Formula
Percentage change = [(647 - 849) / 849] x 100
Subtract the new number by the original number
647 - 849 = -202
-202 ÷ 849 = -0.23792697290930506
-0.23792697290930506 x 100 = -23.79%