200% is the change from 135 to 405
Calculation steps:
[( 405 - 135 ) ÷ 135] x 100 = 200%
Formula
Percentage change = [(405 - 135) / 135] x 100
Subtract the new number by the original number
405 - 135 = 270
270 ÷ 135 = 2
2 x 100 = 200%
Example