33.54% is the change from 647 to 864
Calculation steps:
[( 864 - 647 ) ÷ 647] x 100 = 33.54%
Formula
Percentage change = [(864 - 647) / 647] x 100
Subtract the new number by the original number
864 - 647 = 217
217 ÷ 647 = 0.33539412673879443
0.33539412673879443 x 100 = 33.54%