60.94% is the change from 192 to 309
Calculation steps:
[( 309 - 192 ) ÷ 192] x 100 = 60.94%
Formula
Percentage change = [(309 - 192) / 192] x 100
Subtract the new number by the original number
309 - 192 = 117
117 ÷ 192 = 0.609375
0.609375 x 100 = 60.94%