-61.12% is the change from 800 to 311
Calculation steps:
[( 311 - 800 ) ÷ 800] x 100 = -61.12%
Formula
Percentage change = [(311 - 800) / 800] x 100
Subtract the new number by the original number
311 - 800 = -489
-489 ÷ 800 = -0.61125
-0.61125 x 100 = -61.12%