85.51% is the change from 138 to 256
Calculation steps:
[( 256 - 138 ) ÷ 138] x 100 = 85.51%
Formula
Percentage change = [(256 - 138) / 138] x 100
Subtract the new number by the original number
256 - 138 = 118
118 ÷ 138 = 0.855072463768116
0.855072463768116 x 100 = 85.51%