155.56% is the change from 270 to 690
Calculation steps:
[( 690 - 270 ) ÷ 270] x 100 = 155.56%
Formula
Percentage change = [(690 - 270) / 270] x 100
Subtract the new number by the original number
690 - 270 = 420
420 ÷ 270 = 1.5555555555555556
1.5555555555555556 x 100 = 155.56%