3.37% is the change from 891 to 921
Calculation steps:
[( 921 - 891 ) ÷ 891] x 100 = 3.37%
Formula
Percentage change = [(921 - 891) / 891] x 100
Subtract the new number by the original number
921 - 891 = 30
30 ÷ 891 = 0.03367003367003367
0.03367003367003367 x 100 = 3.37%