-3.42% is the change from 848 to 819
Calculation steps:
[( 819 - 848 ) ÷ 848] x 100 = -3.42%
Formula
Percentage change = [(819 - 848) / 848] x 100
Subtract the new number by the original number
819 - 848 = -29
-29 ÷ 848 = -0.03419811320754717
-0.03419811320754717 x 100 = -3.42%