33.8% is the change from 642 to 859
Calculation steps:
[( 859 - 642 ) ÷ 642] x 100 = 33.8%
Formula
Percentage change = [(859 - 642) / 642] x 100
Subtract the new number by the original number
859 - 642 = 217
217 ÷ 642 = 0.338006230529595
0.338006230529595 x 100 = 33.8%