1.3% is the change from 615 to 623
Calculation steps:
[( 623 - 615 ) ÷ 615] x 100 = 1.3%
Formula
Percentage change = [(623 - 615) / 615] x 100
Subtract the new number by the original number
623 - 615 = 8
8 ÷ 615 = 0.013008130081300813
0.013008130081300813 x 100 = 1.3%