-33.12% is the change from 779 to 521
Calculation steps:
[( 521 - 779 ) ÷ 779] x 100 = -33.12%
Formula
Percentage change = [(521 - 779) / 779] x 100
Subtract the new number by the original number
521 - 779 = -258
-258 ÷ 779 = -0.33119383825417203
-0.33119383825417203 x 100 = -33.12%