620.78% is the change from 77 to 555
Calculation steps:
[( 555 - 77 ) ÷ 77] x 100 = 620.78%
Formula
Percentage change = [(555 - 77) / 77] x 100
Subtract the new number by the original number
555 - 77 = 478
478 ÷ 77 = 6.207792207792208
6.207792207792208 x 100 = 620.78%