-55% is the change from 800 to 360
Calculation steps:
[( 360 - 800 ) ÷ 800] x 100 = -55%
Formula
Percentage change = [(360 - 800) / 800] x 100
Subtract the new number by the original number
360 - 800 = -440
-440 ÷ 800 = -0.55
-0.55 x 100 = -55%
Example