-81.38% is the change from 800 to 149
Calculation steps:
[( 149 - 800 ) ÷ 800] x 100 = -81.38%
Formula
Percentage change = [(149 - 800) / 800] x 100
Subtract the new number by the original number
149 - 800 = -651
-651 ÷ 800 = -0.81375
-0.81375 x 100 = -81.38%