-35.1% is the change from 775 to 503
Calculation steps:
[( 503 - 775 ) ÷ 775] x 100 = -35.1%
Formula
Percentage change = [(503 - 775) / 775] x 100
Subtract the new number by the original number
503 - 775 = -272
-272 ÷ 775 = -0.35096774193548386
-0.35096774193548386 x 100 = -35.1%