-7.01% is the change from 685 to 637
Calculation steps:
[( 637 - 685 ) ÷ 685] x 100 = -7.01%
Formula
Percentage change = [(637 - 685) / 685] x 100
Subtract the new number by the original number
637 - 685 = -48
-48 ÷ 685 = -0.07007299270072993
-0.07007299270072993 x 100 = -7.01%