154.99% is the change from 391 to 997
Calculation steps:
[( 997 - 391 ) ÷ 391] x 100 = 154.99%
Formula
Percentage change = [(997 - 391) / 391] x 100
Subtract the new number by the original number
997 - 391 = 606
606 ÷ 391 = 1.5498721227621484
1.5498721227621484 x 100 = 154.99%