234.38% is the change from 192 to 642
Calculation steps:
[( 642 - 192 ) ÷ 192] x 100 = 234.38%
Formula
Percentage change = [(642 - 192) / 192] x 100
Subtract the new number by the original number
642 - 192 = 450
450 ÷ 192 = 2.34375
2.34375 x 100 = 234.38%