167.5% is the change from 280 to 749
Calculation steps:
[( 749 - 280 ) ÷ 280] x 100 = 167.5%
Formula
Percentage change = [(749 - 280) / 280] x 100
Subtract the new number by the original number
749 - 280 = 469
469 ÷ 280 = 1.675
1.675 x 100 = 167.5%
Example