-54.35% is the change from 920 to 420
Calculation steps:
[( 420 - 920 ) ÷ 920] x 100 = -54.35%
Formula
Percentage change = [(420 - 920) / 920] x 100
Subtract the new number by the original number
420 - 920 = -500
-500 ÷ 920 = -0.5434782608695652
-0.5434782608695652 x 100 = -54.35%