34.06% is the change from 687 to 921
Calculation steps:
[( 921 - 687 ) ÷ 687] x 100 = 34.06%
Formula
Percentage change = [(921 - 687) / 687] x 100
Subtract the new number by the original number
921 - 687 = 234
234 ÷ 687 = 0.3406113537117904
0.3406113537117904 x 100 = 34.06%