39.72% is the change from 647 to 904
Calculation steps:
[( 904 - 647 ) ÷ 647] x 100 = 39.72%
Formula
Percentage change = [(904 - 647) / 647] x 100
Subtract the new number by the original number
904 - 647 = 257
257 ÷ 647 = 0.3972179289026275
0.3972179289026275 x 100 = 39.72%