138.93% is the change from 280 to 669
Calculation steps:
[( 669 - 280 ) ÷ 280] x 100 = 138.93%
Formula
Percentage change = [(669 - 280) / 280] x 100
Subtract the new number by the original number
669 - 280 = 389
389 ÷ 280 = 1.3892857142857142
1.3892857142857142 x 100 = 138.93%