164.38% is the change from 306 to 809
Calculation steps:
[( 809 - 306 ) ÷ 306] x 100 = 164.38%
Formula
Percentage change = [(809 - 306) / 306] x 100
Subtract the new number by the original number
809 - 306 = 503
503 ÷ 306 = 1.6437908496732025
1.6437908496732025 x 100 = 164.38%