-6.4% is the change from 984 to 921
Calculation steps:
[( 921 - 984 ) ÷ 984] x 100 = -6.4%
Formula
Percentage change = [(921 - 984) / 984] x 100
Subtract the new number by the original number
921 - 984 = -63
-63 ÷ 984 = -0.06402439024390244
-0.06402439024390244 x 100 = -6.4%