85.57% is the change from 305 to 566
Calculation steps:
[( 566 - 305 ) ÷ 305] x 100 = 85.57%
Formula
Percentage change = [(566 - 305) / 305] x 100
Subtract the new number by the original number
566 - 305 = 261
261 ÷ 305 = 0.8557377049180328
0.8557377049180328 x 100 = 85.57%