-36.89% is the change from 816 to 515
Calculation steps:
[( 515 - 816 ) ÷ 816] x 100 = -36.89%
Formula
Percentage change = [(515 - 816) / 816] x 100
Subtract the new number by the original number
515 - 816 = -301
-301 ÷ 816 = -0.36887254901960786
-0.36887254901960786 x 100 = -36.89%