-61.75% is the change from 800 to 306
Calculation steps:
[( 306 - 800 ) ÷ 800] x 100 = -61.75%
Formula
Percentage change = [(306 - 800) / 800] x 100
Subtract the new number by the original number
306 - 800 = -494
-494 ÷ 800 = -0.6175
-0.6175 x 100 = -61.75%