36.36% is the change from 55 to 75
Calculation steps:
[( 75 - 55 ) ÷ 55] x 100 = 36.36%
Formula
Percentage change = [(75 - 55) / 55] x 100
Subtract the new number by the original number
75 - 55 = 20
20 ÷ 55 = 0.36363636363636365
0.36363636363636365 x 100 = 36.36%