30.14% is the change from 647 to 842
Calculation steps:
[( 842 - 647 ) ÷ 647] x 100 = 30.14%
Formula
Percentage change = [(842 - 647) / 647] x 100
Subtract the new number by the original number
842 - 647 = 195
195 ÷ 647 = 0.30139103554868624
0.30139103554868624 x 100 = 30.14%