-38.48% is the change from 816 to 502
Calculation steps:
[( 502 - 816 ) ÷ 816] x 100 = -38.48%
Formula
Percentage change = [(502 - 816) / 816] x 100
Subtract the new number by the original number
502 - 816 = -314
-314 ÷ 816 = -0.38480392156862747
-0.38480392156862747 x 100 = -38.48%