284.36% is the change from 211 to 811
Calculation steps:
[( 811 - 211 ) ÷ 211] x 100 = 284.36%
Formula
Percentage change = [(811 - 211) / 211] x 100
Subtract the new number by the original number
811 - 211 = 600
600 ÷ 211 = 2.843601895734597
2.843601895734597 x 100 = 284.36%