-8.63% is the change from 707 to 646
Calculation steps:
[( 646 - 707 ) ÷ 707] x 100 = -8.63%
Formula
Percentage change = [(646 - 707) / 707] x 100
Subtract the new number by the original number
646 - 707 = -61
-61 ÷ 707 = -0.08628005657708628
-0.08628005657708628 x 100 = -8.63%