-96.03% is the change from 680 to 27
Calculation steps:
[( 27 - 680 ) ÷ 680] x 100 = -96.03%
Formula
Percentage change = [(27 - 680) / 680] x 100
Subtract the new number by the original number
27 - 680 = -653
-653 ÷ 680 = -0.9602941176470589
-0.9602941176470589 x 100 = -96.03%