47.8% is the change from 615 to 909
Calculation steps:
[( 909 - 615 ) ÷ 615] x 100 = 47.8%
Formula
Percentage change = [(909 - 615) / 615] x 100
Subtract the new number by the original number
909 - 615 = 294
294 ÷ 615 = 0.47804878048780486
0.47804878048780486 x 100 = 47.8%