5.5% is the change from 873 to 921
Calculation steps:
[( 921 - 873 ) ÷ 873] x 100 = 5.5%
Formula
Percentage change = [(921 - 873) / 873] x 100
Subtract the new number by the original number
921 - 873 = 48
48 ÷ 873 = 0.054982817869415807
0.054982817869415807 x 100 = 5.5%