50.13% is the change from 391 to 587
Calculation steps:
[( 587 - 391 ) ÷ 391] x 100 = 50.13%
Formula
Percentage change = [(587 - 391) / 391] x 100
Subtract the new number by the original number
587 - 391 = 196
196 ÷ 391 = 0.5012787723785166
0.5012787723785166 x 100 = 50.13%