-6.92% is the change from 694 to 646
Calculation steps:
[( 646 - 694 ) ÷ 694] x 100 = -6.92%
Formula
Percentage change = [(646 - 694) / 694] x 100
Subtract the new number by the original number
646 - 694 = -48
-48 ÷ 694 = -0.069164265129683
-0.069164265129683 x 100 = -6.92%