667.19% is the change from 64 to 491
Calculation steps:
[( 491 - 64 ) ÷ 64] x 100 = 667.19%
Formula
Percentage change = [(491 - 64) / 64] x 100
Subtract the new number by the original number
491 - 64 = 427
427 ÷ 64 = 6.671875
6.671875 x 100 = 667.19%