18.7% is the change from 615 to 730
Calculation steps:
[( 730 - 615 ) ÷ 615] x 100 = 18.7%
Formula
Percentage change = [(730 - 615) / 615] x 100
Subtract the new number by the original number
730 - 615 = 115
115 ÷ 615 = 0.18699186991869918
0.18699186991869918 x 100 = 18.7%