143.11% is the change from 399 to 970
Calculation steps:
[( 970 - 399 ) ÷ 399] x 100 = 143.11%
Formula
Percentage change = [(970 - 399) / 399] x 100
Subtract the new number by the original number
970 - 399 = 571
571 ÷ 399 = 1.431077694235589
1.431077694235589 x 100 = 143.11%