-9.76% is the change from 717 to 647
Calculation steps:
[( 647 - 717 ) ÷ 717] x 100 = -9.76%
Formula
Percentage change = [(647 - 717) / 717] x 100
Subtract the new number by the original number
647 - 717 = -70
-70 ÷ 717 = -0.09762900976290098
-0.09762900976290098 x 100 = -9.76%