265.71% is the change from 70 to 256
Calculation steps:
[( 256 - 70 ) ÷ 70] x 100 = 265.71%
Formula
Percentage change = [(256 - 70) / 70] x 100
Subtract the new number by the original number
256 - 70 = 186
186 ÷ 70 = 2.657142857142857
2.657142857142857 x 100 = 265.71%