9.11% is the change from 615 to 671
Calculation steps:
[( 671 - 615 ) ÷ 615] x 100 = 9.11%
Formula
Percentage change = [(671 - 615) / 615] x 100
Subtract the new number by the original number
671 - 615 = 56
56 ÷ 615 = 0.0910569105691057
0.0910569105691057 x 100 = 9.11%