-67.61% is the change from 988 to 320
Calculation steps:
[( 320 - 988 ) ÷ 988] x 100 = -67.61%
Formula
Percentage change = [(320 - 988) / 988] x 100
Subtract the new number by the original number
320 - 988 = -668
-668 ÷ 988 = -0.6761133603238867
-0.6761133603238867 x 100 = -67.61%