-32.61% is the change from 920 to 620
Calculation steps:
[( 620 - 920 ) ÷ 920] x 100 = -32.61%
Formula
Percentage change = [(620 - 920) / 920] x 100
Subtract the new number by the original number
620 - 920 = -300
-300 ÷ 920 = -0.32608695652173914
-0.32608695652173914 x 100 = -32.61%