27.86% is the change from 646 to 826
Calculation steps:
[( 826 - 646 ) ÷ 646] x 100 = 27.86%
Formula
Percentage change = [(826 - 646) / 646] x 100
Subtract the new number by the original number
826 - 646 = 180
180 ÷ 646 = 0.2786377708978328
0.2786377708978328 x 100 = 27.86%