165.63% is the change from 128 to 340
Calculation steps:
[( 340 - 128 ) ÷ 128] x 100 = 165.63%
Formula
Percentage change = [(340 - 128) / 128] x 100
Subtract the new number by the original number
340 - 128 = 212
212 ÷ 128 = 1.65625
1.65625 x 100 = 165.63%