-30.18% is the change from 931 to 650
Calculation steps:
[( 650 - 931 ) ÷ 931] x 100 = -30.18%
Formula
Percentage change = [(650 - 931) / 931] x 100
Subtract the new number by the original number
650 - 931 = -281
-281 ÷ 931 = -0.30182599355531686
-0.30182599355531686 x 100 = -30.18%