-71.25% is the change from 800 to 230
Calculation steps:
[( 230 - 800 ) ÷ 800] x 100 = -71.25%
Formula
Percentage change = [(230 - 800) / 800] x 100
Subtract the new number by the original number
230 - 800 = -570
-570 ÷ 800 = -0.7125
-0.7125 x 100 = -71.25%