271.95% is the change from 82 to 305
Calculation steps:
[( 305 - 82 ) ÷ 82] x 100 = 271.95%
Formula
Percentage change = [(305 - 82) / 82] x 100
Subtract the new number by the original number
305 - 82 = 223
223 ÷ 82 = 2.7195121951219514
2.7195121951219514 x 100 = 271.95%