99.42% is the change from 173 to 345
Calculation steps:
[( 345 - 173 ) ÷ 173] x 100 = 99.42%
Formula
Percentage change = [(345 - 173) / 173] x 100
Subtract the new number by the original number
345 - 173 = 172
172 ÷ 173 = 0.9942196531791907
0.9942196531791907 x 100 = 99.42%