21.39% is the change from 678 to 823
Calculation steps:
[( 823 - 678 ) ÷ 678] x 100 = 21.39%
Formula
Percentage change = [(823 - 678) / 678] x 100
Subtract the new number by the original number
823 - 678 = 145
145 ÷ 678 = 0.21386430678466076
0.21386430678466076 x 100 = 21.39%