164.61% is the change from 308 to 815
Calculation steps:
[( 815 - 308 ) ÷ 308] x 100 = 164.61%
Formula
Percentage change = [(815 - 308) / 308] x 100
Subtract the new number by the original number
815 - 308 = 507
507 ÷ 308 = 1.646103896103896
1.646103896103896 x 100 = 164.61%