6.94% is the change from 821 to 878
Calculation steps:
[( 878 - 821 ) ÷ 821] x 100 = 6.94%
Formula
Percentage change = [(878 - 821) / 821] x 100
Subtract the new number by the original number
878 - 821 = 57
57 ÷ 821 = 0.06942752740560293
0.06942752740560293 x 100 = 6.94%