-30.72% is the change from 778 to 539
Calculation steps:
[( 539 - 778 ) ÷ 778] x 100 = -30.72%
Formula
Percentage change = [(539 - 778) / 778] x 100
Subtract the new number by the original number
539 - 778 = -239
-239 ÷ 778 = -0.30719794344473006
-0.30719794344473006 x 100 = -30.72%