55.56% is the change from 135 to 210
Calculation steps:
[( 210 - 135 ) ÷ 135] x 100 = 55.56%
Formula
Percentage change = [(210 - 135) / 135] x 100
Subtract the new number by the original number
210 - 135 = 75
75 ÷ 135 = 0.5555555555555556
0.5555555555555556 x 100 = 55.56%