21.62% is the change from 259 to 315
Calculation steps:
[( 315 - 259 ) ÷ 259] x 100 = 21.62%
Formula
Percentage change = [(315 - 259) / 259] x 100
Subtract the new number by the original number
315 - 259 = 56
56 ÷ 259 = 0.21621621621621623
0.21621621621621623 x 100 = 21.62%