56.1% is the change from 615 to 960
Calculation steps:
[( 960 - 615 ) ÷ 615] x 100 = 56.1%
Formula
Percentage change = [(960 - 615) / 615] x 100
Subtract the new number by the original number
960 - 615 = 345
345 ÷ 615 = 0.5609756097560976
0.5609756097560976 x 100 = 56.1%