64.06% is the change from 192 to 315
Calculation steps:
[( 315 - 192 ) ÷ 192] x 100 = 64.06%
Formula
Percentage change = [(315 - 192) / 192] x 100
Subtract the new number by the original number
315 - 192 = 123
123 ÷ 192 = 0.640625
0.640625 x 100 = 64.06%