27.74% is the change from 721 to 921
Calculation steps:
[( 921 - 721 ) ÷ 721] x 100 = 27.74%
Formula
Percentage change = [(921 - 721) / 721] x 100
Subtract the new number by the original number
921 - 721 = 200
200 ÷ 721 = 0.27739251040221913
0.27739251040221913 x 100 = 27.74%