84.64% is the change from 280 to 517
Calculation steps:
[( 517 - 280 ) ÷ 280] x 100 = 84.64%
Formula
Percentage change = [(517 - 280) / 280] x 100
Subtract the new number by the original number
517 - 280 = 237
237 ÷ 280 = 0.8464285714285714
0.8464285714285714 x 100 = 84.64%