-90% is the change from 140 to 14
Calculation steps:
[( 14 - 140 ) ÷ 140] x 100 = -90%
Formula
Percentage change = [(14 - 140) / 140] x 100
Subtract the new number by the original number
14 - 140 = -126
-126 ÷ 140 = -0.9
-0.9 x 100 = -90%
Example