136.82% is the change from 421 to 997
Calculation steps:
[( 997 - 421 ) ÷ 421] x 100 = 136.82%
Formula
Percentage change = [(997 - 421) / 421] x 100
Subtract the new number by the original number
997 - 421 = 576
576 ÷ 421 = 1.368171021377672
1.368171021377672 x 100 = 136.82%