164.5% is the change from 307 to 812
Calculation steps:
[( 812 - 307 ) ÷ 307] x 100 = 164.5%
Formula
Percentage change = [(812 - 307) / 307] x 100
Subtract the new number by the original number
812 - 307 = 505
505 ÷ 307 = 1.6449511400651466
1.6449511400651466 x 100 = 164.5%