-28.9% is the change from 910 to 647
Calculation steps:
[( 647 - 910 ) ÷ 910] x 100 = -28.9%
Formula
Percentage change = [(647 - 910) / 910] x 100
Subtract the new number by the original number
647 - 910 = -263
-263 ÷ 910 = -0.289010989010989
-0.289010989010989 x 100 = -28.9%