4.78% is the change from 879 to 921
Calculation steps:
[( 921 - 879 ) ÷ 879] x 100 = 4.78%
Formula
Percentage change = [(921 - 879) / 879] x 100
Subtract the new number by the original number
921 - 879 = 42
42 ÷ 879 = 0.04778156996587031
0.04778156996587031 x 100 = 4.78%