-90.78% is the change from 770 to 71
Calculation steps:
[( 71 - 770 ) ÷ 770] x 100 = -90.78%
Formula
Percentage change = [(71 - 770) / 770] x 100
Subtract the new number by the original number
71 - 770 = -699
-699 ÷ 770 = -0.9077922077922078
-0.9077922077922078 x 100 = -90.78%