77.33% is the change from 172 to 305
Calculation steps:
[( 305 - 172 ) ÷ 172] x 100 = 77.33%
Formula
Percentage change = [(305 - 172) / 172] x 100
Subtract the new number by the original number
305 - 172 = 133
133 ÷ 172 = 0.7732558139534884
0.7732558139534884 x 100 = 77.33%