-90.98% is the change from 665 to 60
Calculation steps:
[( 60 - 665 ) ÷ 665] x 100 = -90.98%
Formula
Percentage change = [(60 - 665) / 665] x 100
Subtract the new number by the original number
60 - 665 = -605
-605 ÷ 665 = -0.9097744360902256
-0.9097744360902256 x 100 = -90.98%