66.13% is the change from 186 to 309
Calculation steps:
[( 309 - 186 ) ÷ 186] x 100 = 66.13%
Formula
Percentage change = [(309 - 186) / 186] x 100
Subtract the new number by the original number
309 - 186 = 123
123 ÷ 186 = 0.6612903225806451
0.6612903225806451 x 100 = 66.13%