3.2% is the change from 657 to 678
Calculation steps:
[( 678 - 657 ) ÷ 657] x 100 = 3.2%
Formula
Percentage change = [(678 - 657) / 657] x 100
Subtract the new number by the original number
678 - 657 = 21
21 ÷ 657 = 0.0319634703196347
0.0319634703196347 x 100 = 3.2%