-36.22% is the change from 820 to 523
Calculation steps:
[( 523 - 820 ) ÷ 820] x 100 = -36.22%
Formula
Percentage change = [(523 - 820) / 820] x 100
Subtract the new number by the original number
523 - 820 = -297
-297 ÷ 820 = -0.3621951219512195
-0.3621951219512195 x 100 = -36.22%