170.23% is the change from 309 to 835
Calculation steps:
[( 835 - 309 ) ÷ 309] x 100 = 170.23%
Formula
Percentage change = [(835 - 309) / 309] x 100
Subtract the new number by the original number
835 - 309 = 526
526 ÷ 309 = 1.7022653721682848
1.7022653721682848 x 100 = 170.23%