234.38% is the change from 128 to 428
Calculation steps:
[( 428 - 128 ) ÷ 128] x 100 = 234.38%
Formula
Percentage change = [(428 - 128) / 128] x 100
Subtract the new number by the original number
428 - 128 = 300
300 ÷ 128 = 2.34375
2.34375 x 100 = 234.38%