169.18% is the change from 305 to 821
Calculation steps:
[( 821 - 305 ) ÷ 305] x 100 = 169.18%
Formula
Percentage change = [(821 - 305) / 305] x 100
Subtract the new number by the original number
821 - 305 = 516
516 ÷ 305 = 1.6918032786885246
1.6918032786885246 x 100 = 169.18%