167.1% is the change from 307 to 820
Calculation steps:
[( 820 - 307 ) ÷ 307] x 100 = 167.1%
Formula
Percentage change = [(820 - 307) / 307] x 100
Subtract the new number by the original number
820 - 307 = 513
513 ÷ 307 = 1.6710097719869708
1.6710097719869708 x 100 = 167.1%