-9.05% is the change from 707 to 643
Calculation steps:
[( 643 - 707 ) ÷ 707] x 100 = -9.05%
Formula
Percentage change = [(643 - 707) / 707] x 100
Subtract the new number by the original number
643 - 707 = -64
-64 ÷ 707 = -0.09052333804809053
-0.09052333804809053 x 100 = -9.05%