-37.67% is the change from 807 to 503
Calculation steps:
[( 503 - 807 ) ÷ 807] x 100 = -37.67%
Formula
Percentage change = [(503 - 807) / 807] x 100
Subtract the new number by the original number
503 - 807 = -304
-304 ÷ 807 = -0.37670384138785623
-0.37670384138785623 x 100 = -37.67%