19.23% is the change from 260 to 310
Calculation steps:
[( 310 - 260 ) ÷ 260] x 100 = 19.23%
Formula
Percentage change = [(310 - 260) / 260] x 100
Subtract the new number by the original number
310 - 260 = 50
50 ÷ 260 = 0.19230769230769232
0.19230769230769232 x 100 = 19.23%