138.75% is the change from 400 to 955
Calculation steps:
[( 955 - 400 ) ÷ 400] x 100 = 138.75%
Formula
Percentage change = [(955 - 400) / 400] x 100
Subtract the new number by the original number
955 - 400 = 555
555 ÷ 400 = 1.3875
1.3875 x 100 = 138.75%