172.82% is the change from 309 to 843
Calculation steps:
[( 843 - 309 ) ÷ 309] x 100 = 172.82%
Formula
Percentage change = [(843 - 309) / 309] x 100
Subtract the new number by the original number
843 - 309 = 534
534 ÷ 309 = 1.7281553398058251
1.7281553398058251 x 100 = 172.82%