239.89% is the change from 188 to 639
Calculation steps:
[( 639 - 188 ) ÷ 188] x 100 = 239.89%
Formula
Percentage change = [(639 - 188) / 188] x 100
Subtract the new number by the original number
639 - 188 = 451
451 ÷ 188 = 2.398936170212766
2.398936170212766 x 100 = 239.89%