64.35% is the change from 317 to 521
Calculation steps:
[( 521 - 317 ) ÷ 317] x 100 = 64.35%
Formula
Percentage change = [(521 - 317) / 317] x 100
Subtract the new number by the original number
521 - 317 = 204
204 ÷ 317 = 0.6435331230283912
0.6435331230283912 x 100 = 64.35%