-35.51% is the change from 780 to 503
Calculation steps:
[( 503 - 780 ) ÷ 780] x 100 = -35.51%
Formula
Percentage change = [(503 - 780) / 780] x 100
Subtract the new number by the original number
503 - 780 = -277
-277 ÷ 780 = -0.35512820512820514
-0.35512820512820514 x 100 = -35.51%