610.94% is the change from 64 to 455
Calculation steps:
[( 455 - 64 ) ÷ 64] x 100 = 610.94%
Formula
Percentage change = [(455 - 64) / 64] x 100
Subtract the new number by the original number
455 - 64 = 391
391 ÷ 64 = 6.109375
6.109375 x 100 = 610.94%