12.25% is the change from 645 to 724
Calculation steps:
[( 724 - 645 ) ÷ 645] x 100 = 12.25%
Formula
Percentage change = [(724 - 645) / 645] x 100
Subtract the new number by the original number
724 - 645 = 79
79 ÷ 645 = 0.12248062015503876
0.12248062015503876 x 100 = 12.25%