138.71% is the change from 279 to 666
Calculation steps:
[( 666 - 279 ) ÷ 279] x 100 = 138.71%
Formula
Percentage change = [(666 - 279) / 279] x 100
Subtract the new number by the original number
666 - 279 = 387
387 ÷ 279 = 1.3870967741935485
1.3870967741935485 x 100 = 138.71%