-66.59% is the change from 823 to 275
Calculation steps:
[( 275 - 823 ) ÷ 823] x 100 = -66.59%
Formula
Percentage change = [(275 - 823) / 823] x 100
Subtract the new number by the original number
275 - 823 = -548
-548 ÷ 823 = -0.6658566221142163
-0.6658566221142163 x 100 = -66.59%