51.11% is the change from 135 to 204
Calculation steps:
[( 204 - 135 ) ÷ 135] x 100 = 51.11%
Formula
Percentage change = [(204 - 135) / 135] x 100
Subtract the new number by the original number
204 - 135 = 69
69 ÷ 135 = 0.5111111111111111
0.5111111111111111 x 100 = 51.11%