165.47% is the change from 307 to 815
Calculation steps:
[( 815 - 307 ) ÷ 307] x 100 = 165.47%
Formula
Percentage change = [(815 - 307) / 307] x 100
Subtract the new number by the original number
815 - 307 = 508
508 ÷ 307 = 1.6547231270358307
1.6547231270358307 x 100 = 165.47%