-97.91% is the change from 670 to 14
Calculation steps:
[( 14 - 670 ) ÷ 670] x 100 = -97.91%
Formula
Percentage change = [(14 - 670) / 670] x 100
Subtract the new number by the original number
14 - 670 = -656
-656 ÷ 670 = -0.9791044776119403
-0.9791044776119403 x 100 = -97.91%