1.86% is the change from 645 to 657
Calculation steps:
[( 657 - 645 ) ÷ 645] x 100 = 1.86%
Formula
Percentage change = [(657 - 645) / 645] x 100
Subtract the new number by the original number
657 - 645 = 12
12 ÷ 645 = 0.018604651162790697
0.018604651162790697 x 100 = 1.86%