4.65% is the change from 645 to 675
Calculation steps:
[( 675 - 645 ) ÷ 645] x 100 = 4.65%
Formula
Percentage change = [(675 - 645) / 645] x 100
Subtract the new number by the original number
675 - 645 = 30
30 ÷ 645 = 0.046511627906976744
0.046511627906976744 x 100 = 4.65%