20.46% is the change from 259 to 312
Calculation steps:
[( 312 - 259 ) ÷ 259] x 100 = 20.46%
Formula
Percentage change = [(312 - 259) / 259] x 100
Subtract the new number by the original number
312 - 259 = 53
53 ÷ 259 = 0.20463320463320464
0.20463320463320464 x 100 = 20.46%