1.61% is the change from 310 to 315
Calculation steps:
[( 315 - 310 ) ÷ 310] x 100 = 1.61%
Formula
Percentage change = [(315 - 310) / 310] x 100
Subtract the new number by the original number
315 - 310 = 5
5 ÷ 310 = 0.016129032258064516
0.016129032258064516 x 100 = 1.61%