1.21% is the change from 910 to 921
Calculation steps:
[( 921 - 910 ) ÷ 910] x 100 = 1.21%
Formula
Percentage change = [(921 - 910) / 910] x 100
Subtract the new number by the original number
921 - 910 = 11
11 ÷ 910 = 0.012087912087912088
0.012087912087912088 x 100 = 1.21%