494.93% is the change from 138 to 821
Calculation steps:
[( 821 - 138 ) ÷ 138] x 100 = 494.93%
Formula
Percentage change = [(821 - 138) / 138] x 100
Subtract the new number by the original number
821 - 138 = 683
683 ÷ 138 = 4.949275362318841
4.949275362318841 x 100 = 494.93%