137.5% is the change from 128 to 304
Calculation steps:
[( 304 - 128 ) ÷ 128] x 100 = 137.5%
Formula
Percentage change = [(304 - 128) / 128] x 100
Subtract the new number by the original number
304 - 128 = 176
176 ÷ 128 = 1.375
1.375 x 100 = 137.5%
Example