49.41% is the change from 170 to 254
Calculation steps:
[( 254 - 170 ) ÷ 170] x 100 = 49.41%
Formula
Percentage change = [(254 - 170) / 170] x 100
Subtract the new number by the original number
254 - 170 = 84
84 ÷ 170 = 0.49411764705882355
0.49411764705882355 x 100 = 49.41%