3.21% is the change from 872 to 900
Calculation steps:
[( 900 - 872 ) ÷ 872] x 100 = 3.21%
Formula
Percentage change = [(900 - 872) / 872] x 100
Subtract the new number by the original number
900 - 872 = 28
28 ÷ 872 = 0.03211009174311927
0.03211009174311927 x 100 = 3.21%