-27.8% is the change from 928 to 670
Calculation steps:
[( 670 - 928 ) ÷ 928] x 100 = -27.8%
Formula
Percentage change = [(670 - 928) / 928] x 100
Subtract the new number by the original number
670 - 928 = -258
-258 ÷ 928 = -0.27801724137931033
-0.27801724137931033 x 100 = -27.8%