-55.37% is the change from 717 to 320
Calculation steps:
[( 320 - 717 ) ÷ 717] x 100 = -55.37%
Formula
Percentage change = [(320 - 717) / 717] x 100
Subtract the new number by the original number
320 - 717 = -397
-397 ÷ 717 = -0.5536959553695955
-0.5536959553695955 x 100 = -55.37%