-1.45% is the change from 690 to 680
Calculation steps:
[( 680 - 690 ) ÷ 690] x 100 = -1.45%
Formula
Percentage change = [(680 - 690) / 690] x 100
Subtract the new number by the original number
680 - 690 = -10
-10 ÷ 690 = -0.014492753623188406
-0.014492753623188406 x 100 = -1.45%