555.84% is the change from 77 to 505
Calculation steps:
[( 505 - 77 ) ÷ 77] x 100 = 555.84%
Formula
Percentage change = [(505 - 77) / 77] x 100
Subtract the new number by the original number
505 - 77 = 428
428 ÷ 77 = 5.558441558441558
5.558441558441558 x 100 = 555.84%