-7.65% is the change from 680 to 628
Calculation steps:
[( 628 - 680 ) ÷ 680] x 100 = -7.65%
Formula
Percentage change = [(628 - 680) / 680] x 100
Subtract the new number by the original number
628 - 680 = -52
-52 ÷ 680 = -0.07647058823529412
-0.07647058823529412 x 100 = -7.65%