-96.98% is the change from 662 to 20
Calculation steps:
[( 20 - 662 ) ÷ 662] x 100 = -96.98%
Formula
Percentage change = [(20 - 662) / 662] x 100
Subtract the new number by the original number
20 - 662 = -642
-642 ÷ 662 = -0.9697885196374623
-0.9697885196374623 x 100 = -96.98%