306.57% is the change from 137 to 557
Calculation steps:
[( 557 - 137 ) ÷ 137] x 100 = 306.57%
Formula
Percentage change = [(557 - 137) / 137] x 100
Subtract the new number by the original number
557 - 137 = 420
420 ÷ 137 = 3.065693430656934
3.065693430656934 x 100 = 306.57%