0.44% is the change from 917 to 921
Calculation steps:
[( 921 - 917 ) ÷ 917] x 100 = 0.44%
Formula
Percentage change = [(921 - 917) / 917] x 100
Subtract the new number by the original number
921 - 917 = 4
4 ÷ 917 = 0.004362050163576881
0.004362050163576881 x 100 = 0.44%