165.8% is the change from 307 to 816
Calculation steps:
[( 816 - 307 ) ÷ 307] x 100 = 165.8%
Formula
Percentage change = [(816 - 307) / 307] x 100
Subtract the new number by the original number
816 - 307 = 509
509 ÷ 307 = 1.6579804560260587
1.6579804560260587 x 100 = 165.8%