-5.42% is the change from 683 to 646
Calculation steps:
[( 646 - 683 ) ÷ 683] x 100 = -5.42%
Formula
Percentage change = [(646 - 683) / 683] x 100
Subtract the new number by the original number
646 - 683 = -37
-37 ÷ 683 = -0.05417276720351391
-0.05417276720351391 x 100 = -5.42%