19.32% is the change from 264 to 315
Calculation steps:
[( 315 - 264 ) ÷ 264] x 100 = 19.32%
Formula
Percentage change = [(315 - 264) / 264] x 100
Subtract the new number by the original number
315 - 264 = 51
51 ÷ 264 = 0.19318181818181818
0.19318181818181818 x 100 = 19.32%