287.8% is the change from 82 to 318
Calculation steps:
[( 318 - 82 ) ÷ 82] x 100 = 287.8%
Formula
Percentage change = [(318 - 82) / 82] x 100
Subtract the new number by the original number
318 - 82 = 236
236 ÷ 82 = 2.8780487804878048
2.8780487804878048 x 100 = 287.8%