6.98% is the change from 645 to 690
Calculation steps:
[( 690 - 645 ) ÷ 645] x 100 = 6.98%
Formula
Percentage change = [(690 - 645) / 645] x 100
Subtract the new number by the original number
690 - 645 = 45
45 ÷ 645 = 0.06976744186046512
0.06976744186046512 x 100 = 6.98%