1.3% is the change from 308 to 312
Calculation steps:
[( 312 - 308 ) ÷ 308] x 100 = 1.3%
Formula
Percentage change = [(312 - 308) / 308] x 100
Subtract the new number by the original number
312 - 308 = 4
4 ÷ 308 = 0.012987012987012988
0.012987012987012988 x 100 = 1.3%