150.5% is the change from 398 to 997
Calculation steps:
[( 997 - 398 ) ÷ 398] x 100 = 150.5%
Formula
Percentage change = [(997 - 398) / 398] x 100
Subtract the new number by the original number
997 - 398 = 599
599 ÷ 398 = 1.5050251256281406
1.5050251256281406 x 100 = 150.5%