-30.51% is the change from 780 to 542
Calculation steps:
[( 542 - 780 ) ÷ 780] x 100 = -30.51%
Formula
Percentage change = [(542 - 780) / 780] x 100
Subtract the new number by the original number
542 - 780 = -238
-238 ÷ 780 = -0.30512820512820515
-0.30512820512820515 x 100 = -30.51%