30.57% is the change from 471 to 615
Calculation steps:
[( 615 - 471 ) ÷ 471] x 100 = 30.57%
Formula
Percentage change = [(615 - 471) / 471] x 100
Subtract the new number by the original number
615 - 471 = 144
144 ÷ 471 = 0.3057324840764331
0.3057324840764331 x 100 = 30.57%