-62.75% is the change from 816 to 304
Calculation steps:
[( 304 - 816 ) ÷ 816] x 100 = -62.75%
Formula
Percentage change = [(304 - 816) / 816] x 100
Subtract the new number by the original number
304 - 816 = -512
-512 ÷ 816 = -0.6274509803921569
-0.6274509803921569 x 100 = -62.75%