34.74% is the change from 190 to 256
Calculation steps:
[( 256 - 190 ) ÷ 190] x 100 = 34.74%
Formula
Percentage change = [(256 - 190) / 190] x 100
Subtract the new number by the original number
256 - 190 = 66
66 ÷ 190 = 0.3473684210526316
0.3473684210526316 x 100 = 34.74%