144.36% is the change from 399 to 975
Calculation steps:
[( 975 - 399 ) ÷ 399] x 100 = 144.36%
Formula
Percentage change = [(975 - 399) / 399] x 100
Subtract the new number by the original number
975 - 399 = 576
576 ÷ 399 = 1.443609022556391
1.443609022556391 x 100 = 144.36%