140.23% is the change from 256 to 615
Calculation steps:
[( 615 - 256 ) ÷ 256] x 100 = 140.23%
Formula
Percentage change = [(615 - 256) / 256] x 100
Subtract the new number by the original number
615 - 256 = 359
359 ÷ 256 = 1.40234375
1.40234375 x 100 = 140.23%