20.39% is the change from 662 to 797
Calculation steps:
[( 797 - 662 ) ÷ 662] x 100 = 20.39%
Formula
Percentage change = [(797 - 662) / 662] x 100
Subtract the new number by the original number
797 - 662 = 135
135 ÷ 662 = 0.2039274924471299
0.2039274924471299 x 100 = 20.39%