-52.72% is the change from 827 to 391
Calculation steps:
[( 391 - 827 ) ÷ 827] x 100 = -52.72%
Formula
Percentage change = [(391 - 827) / 827] x 100
Subtract the new number by the original number
391 - 827 = -436
-436 ÷ 827 = -0.5272067714631197
-0.5272067714631197 x 100 = -52.72%