91.8% is the change from 305 to 585
Calculation steps:
[( 585 - 305 ) ÷ 305] x 100 = 91.8%
Formula
Percentage change = [(585 - 305) / 305] x 100
Subtract the new number by the original number
585 - 305 = 280
280 ÷ 305 = 0.9180327868852459
0.9180327868852459 x 100 = 91.8%