54.91% is the change from 397 to 615
Calculation steps:
[( 615 - 397 ) ÷ 397] x 100 = 54.91%
Formula
Percentage change = [(615 - 397) / 397] x 100
Subtract the new number by the original number
615 - 397 = 218
218 ÷ 397 = 0.5491183879093199
0.5491183879093199 x 100 = 54.91%