-27.93% is the change from 920 to 663
Calculation steps:
[( 663 - 920 ) ÷ 920] x 100 = -27.93%
Formula
Percentage change = [(663 - 920) / 920] x 100
Subtract the new number by the original number
663 - 920 = -257
-257 ÷ 920 = -0.2793478260869565
-0.2793478260869565 x 100 = -27.93%