31.56% is the change from 488 to 642
Calculation steps:
[( 642 - 488 ) ÷ 488] x 100 = 31.56%
Formula
Percentage change = [(642 - 488) / 488] x 100
Subtract the new number by the original number
642 - 488 = 154
154 ÷ 488 = 0.3155737704918033
0.3155737704918033 x 100 = 31.56%