388.89% is the change from 135 to 660
Calculation steps:
[( 660 - 135 ) ÷ 135] x 100 = 388.89%
Formula
Percentage change = [(660 - 135) / 135] x 100
Subtract the new number by the original number
660 - 135 = 525
525 ÷ 135 = 3.888888888888889
3.888888888888889 x 100 = 388.89%