-39.1% is the change from 826 to 503
Calculation steps:
[( 503 - 826 ) ÷ 826] x 100 = -39.1%
Formula
Percentage change = [(503 - 826) / 826] x 100
Subtract the new number by the original number
503 - 826 = -323
-323 ÷ 826 = -0.3910411622276029
-0.3910411622276029 x 100 = -39.1%