76.57% is the change from 175 to 309
Calculation steps:
[( 309 - 175 ) ÷ 175] x 100 = 76.57%
Formula
Percentage change = [(309 - 175) / 175] x 100
Subtract the new number by the original number
309 - 175 = 134
134 ÷ 175 = 0.7657142857142857
0.7657142857142857 x 100 = 76.57%