30.49% is the change from 492 to 642
Calculation steps:
[( 642 - 492 ) ÷ 492] x 100 = 30.49%
Formula
Percentage change = [(642 - 492) / 492] x 100
Subtract the new number by the original number
642 - 492 = 150
150 ÷ 492 = 0.3048780487804878
0.3048780487804878 x 100 = 30.49%