82.86% is the change from 280 to 512
Calculation steps:
[( 512 - 280 ) ÷ 280] x 100 = 82.86%
Formula
Percentage change = [(512 - 280) / 280] x 100
Subtract the new number by the original number
512 - 280 = 232
232 ÷ 280 = 0.8285714285714286
0.8285714285714286 x 100 = 82.86%