-51.97% is the change from 814 to 391
Calculation steps:
[( 391 - 814 ) ÷ 814] x 100 = -51.97%
Formula
Percentage change = [(391 - 814) / 814] x 100
Subtract the new number by the original number
391 - 814 = -423
-423 ÷ 814 = -0.5196560196560197
-0.5196560196560197 x 100 = -51.97%