21.53% is the change from 678 to 824
Calculation steps:
[( 824 - 678 ) ÷ 678] x 100 = 21.53%
Formula
Percentage change = [(824 - 678) / 678] x 100
Subtract the new number by the original number
824 - 678 = 146
146 ÷ 678 = 0.2153392330383481
0.2153392330383481 x 100 = 21.53%