-62.7% is the change from 823 to 307
Calculation steps:
[( 307 - 823 ) ÷ 823] x 100 = -62.7%
Formula
Percentage change = [(307 - 823) / 823] x 100
Subtract the new number by the original number
307 - 823 = -516
-516 ÷ 823 = -0.6269744835965978
-0.6269744835965978 x 100 = -62.7%