-38.43% is the change from 817 to 503
Calculation steps:
[( 503 - 817 ) ÷ 817] x 100 = -38.43%
Formula
Percentage change = [(503 - 817) / 817] x 100
Subtract the new number by the original number
503 - 817 = -314
-314 ÷ 817 = -0.3843329253365973
-0.3843329253365973 x 100 = -38.43%