27.55% is the change from 646 to 824
Calculation steps:
[( 824 - 646 ) ÷ 646] x 100 = 27.55%
Formula
Percentage change = [(824 - 646) / 646] x 100
Subtract the new number by the original number
824 - 646 = 178
178 ÷ 646 = 0.2755417956656347
0.2755417956656347 x 100 = 27.55%