-81.99% is the change from 805 to 145
Calculation steps:
[( 145 - 805 ) ÷ 805] x 100 = -81.99%
Formula
Percentage change = [(145 - 805) / 805] x 100
Subtract the new number by the original number
145 - 805 = -660
-660 ÷ 805 = -0.8198757763975155
-0.8198757763975155 x 100 = -81.99%