222.8% is the change from 307 to 991
Calculation steps:
[( 991 - 307 ) ÷ 307] x 100 = 222.8%
Formula
Percentage change = [(991 - 307) / 307] x 100
Subtract the new number by the original number
991 - 307 = 684
684 ÷ 307 = 2.228013029315961
2.228013029315961 x 100 = 222.8%