24.61% is the change from 642 to 800
Calculation steps:
[( 800 - 642 ) ÷ 642] x 100 = 24.61%
Formula
Percentage change = [(800 - 642) / 642] x 100
Subtract the new number by the original number
800 - 642 = 158
158 ÷ 642 = 0.24610591900311526
0.24610591900311526 x 100 = 24.61%