-8.9% is the change from 708 to 645
Calculation steps:
[( 645 - 708 ) ÷ 708] x 100 = -8.9%
Formula
Percentage change = [(645 - 708) / 708] x 100
Subtract the new number by the original number
645 - 708 = -63
-63 ÷ 708 = -0.08898305084745763
-0.08898305084745763 x 100 = -8.9%