-51.66% is the change from 811 to 392
Calculation steps:
[( 392 - 811 ) ÷ 811] x 100 = -51.66%
Formula
Percentage change = [(392 - 811) / 811] x 100
Subtract the new number by the original number
392 - 811 = -419
-419 ÷ 811 = -0.5166461159062885
-0.5166461159062885 x 100 = -51.66%