639.74% is the change from 78 to 577
Calculation steps:
[( 577 - 78 ) ÷ 78] x 100 = 639.74%
Formula
Percentage change = [(577 - 78) / 78] x 100
Subtract the new number by the original number
577 - 78 = 499
499 ÷ 78 = 6.397435897435898
6.397435897435898 x 100 = 639.74%