-70.5% is the change from 800 to 236
Calculation steps:
[( 236 - 800 ) ÷ 800] x 100 = -70.5%
Formula
Percentage change = [(236 - 800) / 800] x 100
Subtract the new number by the original number
236 - 800 = -564
-564 ÷ 800 = -0.705
-0.705 x 100 = -70.5%