-81.19% is the change from 771 to 145
Calculation steps:
[( 145 - 771 ) ÷ 771] x 100 = -81.19%
Formula
Percentage change = [(145 - 771) / 771] x 100
Subtract the new number by the original number
145 - 771 = -626
-626 ÷ 771 = -0.8119325551232166
-0.8119325551232166 x 100 = -81.19%