149.87% is the change from 399 to 997
Calculation steps:
[( 997 - 399 ) ÷ 399] x 100 = 149.87%
Formula
Percentage change = [(997 - 399) / 399] x 100
Subtract the new number by the original number
997 - 399 = 598
598 ÷ 399 = 1.4987468671679198
1.4987468671679198 x 100 = 149.87%