64.92% is the change from 191 to 315
Calculation steps:
[( 315 - 191 ) ÷ 191] x 100 = 64.92%
Formula
Percentage change = [(315 - 191) / 191] x 100
Subtract the new number by the original number
315 - 191 = 124
124 ÷ 191 = 0.6492146596858639
0.6492146596858639 x 100 = 64.92%