64.89% is the change from 188 to 310
Calculation steps:
[( 310 - 188 ) ÷ 188] x 100 = 64.89%
Formula
Percentage change = [(310 - 188) / 188] x 100
Subtract the new number by the original number
310 - 188 = 122
122 ÷ 188 = 0.648936170212766
0.648936170212766 x 100 = 64.89%