-72.4% is the change from 779 to 215
Calculation steps:
[( 215 - 779 ) ÷ 779] x 100 = -72.4%
Formula
Percentage change = [(215 - 779) / 779] x 100
Subtract the new number by the original number
215 - 779 = -564
-564 ÷ 779 = -0.72400513478819
-0.72400513478819 x 100 = -72.4%