821.82% is the change from 55 to 507
Calculation steps:
[( 507 - 55 ) ÷ 55] x 100 = 821.82%
Formula
Percentage change = [(507 - 55) / 55] x 100
Subtract the new number by the original number
507 - 55 = 452
452 ÷ 55 = 8.218181818181819
8.218181818181819 x 100 = 821.82%