1.29% is the change from 311 to 315
Calculation steps:
[( 315 - 311 ) ÷ 311] x 100 = 1.29%
Formula
Percentage change = [(315 - 311) / 311] x 100
Subtract the new number by the original number
315 - 311 = 4
4 ÷ 311 = 0.012861736334405145
0.012861736334405145 x 100 = 1.29%