-97.79% is the change from 770 to 17
Calculation steps:
[( 17 - 770 ) ÷ 770] x 100 = -97.79%
Formula
Percentage change = [(17 - 770) / 770] x 100
Subtract the new number by the original number
17 - 770 = -753
-753 ÷ 770 = -0.977922077922078
-0.977922077922078 x 100 = -97.79%