137.84% is the change from 399 to 949
Calculation steps:
[( 949 - 399 ) ÷ 399] x 100 = 137.84%
Formula
Percentage change = [(949 - 399) / 399] x 100
Subtract the new number by the original number
949 - 399 = 550
550 ÷ 399 = 1.3784461152882206
1.3784461152882206 x 100 = 137.84%