150.78% is the change from 128 to 321
Calculation steps:
[( 321 - 128 ) ÷ 128] x 100 = 150.78%
Formula
Percentage change = [(321 - 128) / 128] x 100
Subtract the new number by the original number
321 - 128 = 193
193 ÷ 128 = 1.5078125
1.5078125 x 100 = 150.78%