-7.3% is the change from 685 to 635
Calculation steps:
[( 635 - 685 ) ÷ 685] x 100 = -7.3%
Formula
Percentage change = [(635 - 685) / 685] x 100
Subtract the new number by the original number
635 - 685 = -50
-50 ÷ 685 = -0.072992700729927
-0.072992700729927 x 100 = -7.3%