20.28% is the change from 641 to 771
Calculation steps:
[( 771 - 641 ) ÷ 641] x 100 = 20.28%
Formula
Percentage change = [(771 - 641) / 641] x 100
Subtract the new number by the original number
771 - 641 = 130
130 ÷ 641 = 0.20280811232449297
0.20280811232449297 x 100 = 20.28%