137.38% is the change from 420 to 997
Calculation steps:
[( 997 - 420 ) ÷ 420] x 100 = 137.38%
Formula
Percentage change = [(997 - 420) / 420] x 100
Subtract the new number by the original number
997 - 420 = 577
577 ÷ 420 = 1.3738095238095238
1.3738095238095238 x 100 = 137.38%