-5.22% is the change from 670 to 635
Calculation steps:
[( 635 - 670 ) ÷ 670] x 100 = -5.22%
Formula
Percentage change = [(635 - 670) / 670] x 100
Subtract the new number by the original number
635 - 670 = -35
-35 ÷ 670 = -0.05223880597014925
-0.05223880597014925 x 100 = -5.22%