388.37% is the change from 172 to 840
Calculation steps:
[( 840 - 172 ) ÷ 172] x 100 = 388.37%
Formula
Percentage change = [(840 - 172) / 172] x 100
Subtract the new number by the original number
840 - 172 = 668
668 ÷ 172 = 3.883720930232558
3.883720930232558 x 100 = 388.37%