-30.62% is the change from 934 to 648
Calculation steps:
[( 648 - 934 ) ÷ 934] x 100 = -30.62%
Formula
Percentage change = [(648 - 934) / 934] x 100
Subtract the new number by the original number
648 - 934 = -286
-286 ÷ 934 = -0.30620985010706636
-0.30620985010706636 x 100 = -30.62%