508.43% is the change from 83 to 505
Calculation steps:
[( 505 - 83 ) ÷ 83] x 100 = 508.43%
Formula
Percentage change = [(505 - 83) / 83] x 100
Subtract the new number by the original number
505 - 83 = 422
422 ÷ 83 = 5.0843373493975905
5.0843373493975905 x 100 = 508.43%