-62.62% is the change from 816 to 305
Calculation steps:
[( 305 - 816 ) ÷ 816] x 100 = -62.62%
Formula
Percentage change = [(305 - 816) / 816] x 100
Subtract the new number by the original number
305 - 816 = -511
-511 ÷ 816 = -0.6262254901960784
-0.6262254901960784 x 100 = -62.62%