209.09% is the change from 55 to 170
Calculation steps:
[( 170 - 55 ) ÷ 55] x 100 = 209.09%
Formula
Percentage change = [(170 - 55) / 55] x 100
Subtract the new number by the original number
170 - 55 = 115
115 ÷ 55 = 2.090909090909091
2.090909090909091 x 100 = 209.09%