-95.97% is the change from 670 to 27
Calculation steps:
[( 27 - 670 ) ÷ 670] x 100 = -95.97%
Formula
Percentage change = [(27 - 670) / 670] x 100
Subtract the new number by the original number
27 - 670 = -643
-643 ÷ 670 = -0.9597014925373134
-0.9597014925373134 x 100 = -95.97%