109.09% is the change from 187 to 391
Calculation steps:
[( 391 - 187 ) ÷ 187] x 100 = 109.09%
Formula
Percentage change = [(391 - 187) / 187] x 100
Subtract the new number by the original number
391 - 187 = 204
204 ÷ 187 = 1.0909090909090908
1.0909090909090908 x 100 = 109.09%