-97.56% is the change from 779 to 19
Calculation steps:
[( 19 - 779 ) ÷ 779] x 100 = -97.56%
Formula
Percentage change = [(19 - 779) / 779] x 100
Subtract the new number by the original number
19 - 779 = -760
-760 ÷ 779 = -0.975609756097561
-0.975609756097561 x 100 = -97.56%