300.49% is the change from 205 to 821
Calculation steps:
[( 821 - 205 ) ÷ 205] x 100 = 300.49%
Formula
Percentage change = [(821 - 205) / 205] x 100
Subtract the new number by the original number
821 - 205 = 616
616 ÷ 205 = 3.004878048780488
3.004878048780488 x 100 = 300.49%