4.9% is the change from 878 to 921
Calculation steps:
[( 921 - 878 ) ÷ 878] x 100 = 4.9%
Formula
Percentage change = [(921 - 878) / 878] x 100
Subtract the new number by the original number
921 - 878 = 43
43 ÷ 878 = 0.0489749430523918
0.0489749430523918 x 100 = 4.9%