138.6% is the change from 399 to 952
Calculation steps:
[( 952 - 399 ) ÷ 399] x 100 = 138.6%
Formula
Percentage change = [(952 - 399) / 399] x 100
Subtract the new number by the original number
952 - 399 = 553
553 ÷ 399 = 1.3859649122807018
1.3859649122807018 x 100 = 138.6%