47.4% is the change from 173 to 255
Calculation steps:
[( 255 - 173 ) ÷ 173] x 100 = 47.4%
Formula
Percentage change = [(255 - 173) / 173] x 100
Subtract the new number by the original number
255 - 173 = 82
82 ÷ 173 = 0.47398843930635837
0.47398843930635837 x 100 = 47.4%