-0.75% is the change from 928 to 921
Calculation steps:
[( 921 - 928 ) ÷ 928] x 100 = -0.75%
Formula
Percentage change = [(921 - 928) / 928] x 100
Subtract the new number by the original number
921 - 928 = -7
-7 ÷ 928 = -0.007543103448275862
-0.007543103448275862 x 100 = -0.75%