165.9% is the change from 305 to 811
Calculation steps:
[( 811 - 305 ) ÷ 305] x 100 = 165.9%
Formula
Percentage change = [(811 - 305) / 305] x 100
Subtract the new number by the original number
811 - 305 = 506
506 ÷ 305 = 1.659016393442623
1.659016393442623 x 100 = 165.9%