30.97% is the change from 494 to 647
Calculation steps:
[( 647 - 494 ) ÷ 494] x 100 = 30.97%
Formula
Percentage change = [(647 - 494) / 494] x 100
Subtract the new number by the original number
647 - 494 = 153
153 ÷ 494 = 0.3097165991902834
0.3097165991902834 x 100 = 30.97%