-69.3% is the change from 811 to 249
Calculation steps:
[( 249 - 811 ) ÷ 811] x 100 = -69.3%
Formula
Percentage change = [(249 - 811) / 811] x 100
Subtract the new number by the original number
249 - 811 = -562
-562 ÷ 811 = -0.6929716399506781
-0.6929716399506781 x 100 = -69.3%