-96.07% is the change from 687 to 27
Calculation steps:
[( 27 - 687 ) ÷ 687] x 100 = -96.07%
Formula
Percentage change = [(27 - 687) / 687] x 100
Subtract the new number by the original number
27 - 687 = -660
-660 ÷ 687 = -0.9606986899563319
-0.9606986899563319 x 100 = -96.07%