168.2% is the change from 305 to 818
Calculation steps:
[( 818 - 305 ) ÷ 305] x 100 = 168.2%
Formula
Percentage change = [(818 - 305) / 305] x 100
Subtract the new number by the original number
818 - 305 = 513
513 ÷ 305 = 1.681967213114754
1.681967213114754 x 100 = 168.2%