-7.71% is the change from 700 to 646
Calculation steps:
[( 646 - 700 ) ÷ 700] x 100 = -7.71%
Formula
Percentage change = [(646 - 700) / 700] x 100
Subtract the new number by the original number
646 - 700 = -54
-54 ÷ 700 = -0.07714285714285714
-0.07714285714285714 x 100 = -7.71%