87.21% is the change from 305 to 571
Calculation steps:
[( 571 - 305 ) ÷ 305] x 100 = 87.21%
Formula
Percentage change = [(571 - 305) / 305] x 100
Subtract the new number by the original number
571 - 305 = 266
266 ÷ 305 = 0.8721311475409836
0.8721311475409836 x 100 = 87.21%