490.7% is the change from 86 to 508
Calculation steps:
[( 508 - 86 ) ÷ 86] x 100 = 490.7%
Formula
Percentage change = [(508 - 86) / 86] x 100
Subtract the new number by the original number
508 - 86 = 422
422 ÷ 86 = 4.906976744186046
4.906976744186046 x 100 = 490.7%