-81.78% is the change from 807 to 147
Calculation steps:
[( 147 - 807 ) ÷ 807] x 100 = -81.78%
Formula
Percentage change = [(147 - 807) / 807] x 100
Subtract the new number by the original number
147 - 807 = -660
-660 ÷ 807 = -0.8178438661710037
-0.8178438661710037 x 100 = -81.78%