280.49% is the change from 82 to 312
Calculation steps:
[( 312 - 82 ) ÷ 82] x 100 = 280.49%
Formula
Percentage change = [(312 - 82) / 82] x 100
Subtract the new number by the original number
312 - 82 = 230
230 ÷ 82 = 2.8048780487804876
2.8048780487804876 x 100 = 280.49%