79.77% is the change from 173 to 311
Calculation steps:
[( 311 - 173 ) ÷ 173] x 100 = 79.77%
Formula
Percentage change = [(311 - 173) / 173] x 100
Subtract the new number by the original number
311 - 173 = 138
138 ÷ 173 = 0.7976878612716763
0.7976878612716763 x 100 = 79.77%