-30.7% is the change from 935 to 648
Calculation steps:
[( 648 - 935 ) ÷ 935] x 100 = -30.7%
Formula
Percentage change = [(648 - 935) / 935] x 100
Subtract the new number by the original number
648 - 935 = -287
-287 ÷ 935 = -0.306951871657754
-0.306951871657754 x 100 = -30.7%